Now that the NFL Draft is in the books, we are standing on the cusp of the NFL preseason. During the coming weeks, rookie mini-camps will grind into gear and hard-core fantasy owners will start the process of evaluating this year’s draft picks potential for “instant impact” during 2008. In redraft fantasy football leagues, one key requirement for the kind of production that fantasy owners crave is opportunity. A player like TE Martellus Bennett (a 2nd-round selection by Dallas) may have all the talent in the world, but his chances for a meaningful 2008 season in fantasy terms are very slight due to being buried on the depth chart behind All-Pro TE Jason Witten.

The below is a preliminary list of the top rookie prospects for redraft fantasy leagues, given their new NFL homes.

Rookie Running Backs

The running back position is where the fantasy gems among the rookies are most likely to be found. While it is true that for every Adrian Peterson (Minnesota) or Joseph Addai one can point at, there are also players like J.J. Arrington or Chris Perry who serve as a counter-examples, it is also true that running backs tend to make the quickest transition to playing at the NFL level. A fantasy owner is most likely to find an “instant impact” player among the rookie running backs in any given calendar year.

Jonathan Stewart is probably the best bet at running back to generate fantasy impact during his rookie season. He is the sort of running back that the Panthers’ coaching staff prefers, and they have been retooling their offensive line for a power running attack - Stewart fits the mold that Carolina is built to utilize. DeAngelo Williams simply isn’t the player the coaching staff wants to rely on as their #1 RB - he is better suited to a change-of-pace, 3rd-down role in their scheme. Stewart figures to have plenty of touches on the ball with the Panthers this year.

Darren McFadden is a boom-or-bust type prospect. Yes, he has the type of speed and top gear that make him a threat to go to the house on every down, and he projects to be the starter with the Raiders (assuming his contract negotiations go well and he avoids a JaMarcus Russell-type holdout scenario). However, there is a crowded RB stable in Oakland, with Justin Fargas coming off a 1000+ yard season - if McFadden struggles with the pro game, he may not get many chances to redeem himself.

Kevin Smith lands with the Lions, who really like his game and seem to be indicating that the starting job is his to lose during 2008. We’ll see if their actions match their draft-day rhetoric - but Tatum Bell hasn’t looked like the answer since he arrived in Detroit, and as of today, he is the only other back of note on the team. If Smith impresses in training camp it wouldn’t be a surprise to see him starting for the Lions in September.

Matt Forte comes into a by-committee backfield situation, with both Cedric Benson and Adrian Peterson grinding out 3.4 yards per carry last season. Peterson was far more productive than Benson in the passing game (51/420/0 receiving vs. 17/123/0) and actually led the team in total yardage and fantasy points at the RB position last year. Benson has greatly underperformed his draft slot (1st round -4th pick in 2005) and may find himself riding the pine if Forte proves that he outperform Benson during training camp.

Rashard Mendenhall is likely to be Willie Parker’s primary backup for this year, but given Parker’s difficulty at the goal-line last year (321/1316/2 rushing), Mendenhall could find a role as the Steelers’ goal-line back (Najeh Davenport gained 107/499/5 rushing and 18/184/2 as the Steelers’ big back/change of pace back last year). If Mendenhall seals the #2 job with Pittsburgh, he could have value in basic scoring leagues (any league where TD production is the primary scoring criteria).

Felix Jones joins fellow rookie Tashard Choice as the new backups to Marion Barber III. Barber looks set to carry the majority of the load for Dallas, but Jones’ outside speed will give him a shot to earn playing time as the 3rd down back/passing down back - depending on how quickly Jones picks up the Cowboys’ offense and learns to pick up the blitz.

Rookie Wide Receivers

Second to the running backs, rookie WRs occasionally step into the NFL and make fantasy owners’ seasons. The most obvious example of this phenomenon would be Randy Moss’s first incredible season (69/1313/17) with Minnesota (he was the #1 fantasy WR as a rookie) - Larry Fitzgerald’s 58/780/8 as a rookie was also pretty outstanding for a rookie WR (30th best fantasy WR during 2004). However, it is far more often the case that rookie WRs bust (especially in their first season of NFL action). The last time I fell hard for a rookie WR’s potential, I ended up having Rashaun Woods among my preseason top 36 fantasy prospects - only to watch him fail miserably at the NFL level. Now-a-days, it is my rule of thumb that exactly zero rookie WRs land among my top 40 or so fantasy prospects until they have proven their skills extensively in training camp and preseason games - and even then I tend to be conservative about drafting them early - I would urge fantasy owners to be very leery of rookie wideouts.

James Hardy appears to have landed in the best situation among the draftees, with a legitimate shot at capturing the #2 wide receiver position on the Buffalo Bills. Other than Lee Evans, the Bills’ WRs generated 1 receiving TD last year (Josh Reed was #2 in yardage with 51/578/0) - not exactly what the coaching staff was looking for, to say the least. However, don’t go overboard with your enthusiasm for Hardy - the Bills were 30th in the NFL when it came to passing offense, so his ceiling as the #2 WR (if he gets that far) is relatively low compared to a player on a franchise like New England.

DeSean Jackson figures to be in the mix in Philadelphia, but the team spreads the ball around quite a bit - the 2nd best receiver on the Eagles over the past two years failed to get over 800 yards receiving or score more than 5 times, and the players at WR3 and below are non-factors in fantasy terms.

Devin Thomas may challenge for playing time in Washington, but with a developing young QB in Jason Campbell and an entrenched #1 WR in Santana Moss combined with a high-scoring TE hogging red-zone chances (Chris Cooley has 6 or more TDs in each of his first 4 seasons) - Thomas will have significant obstacles to overcome before he starts putting up the kind of statistics that make fantasy owners excited.

Malcolm Kelly - see Devin Thomas above.

Jerome Simpson landed with Cincinnati while the Bengals are searching for a replacement WR3 - if he can wow the coaching staff in training camp and sew up the WR3 spot, he could put up decent numbers now and then during 2008.

Rookie Quarterbacks

Excepting Peyton Manning , the exception who proves the rule, no rookie QB has been a fantasy standout during recent memory - even Dan Marino took one season to get up to speed before exploding during his second campaign way back in 1984. Unless you are convinced that Matt Ryan, Joe Flacco or any of the other draftees this year are of the caliber of a Peyton Manning or a Dan Marino, you should probably pass on them during your redraft league’s annual draft.

Matt Ryan will likely get his chance to start during 2008, perhaps early on in the season if Chris Redman falters during training camp. Ryan is sure to suffer typical rookie growing pains once he does get into the lineup, so he probably won’t have any games worth mentioning until very late in the season, if then.

Joe Flacco may be the heir apparent in Baltimore, but he’s currently buried behind Kyle Boller and Troy Smith (last year’s draft pick at the position). The Ravens got burned the last time they rushed a QB into the starting lineup (witness Boller’s checkered career with Baltimore) - they aren’t likely to make the same mistake with Flacco. He’ll likely carry the clipboard after preseason, with occasional spot duty in blow out wins or losses.

Rookie Tight Ends

Rookie tight ends are very seldom worth drafting - Tony Gonzalez scored 2 TDs in his rookie campaign (33/368/2), as did Antonio Gates (24/389/2), as did the ultra-hyped rookie TE of 2007, Greg Olsen (39/391/2). The three above examples are actually best-case scenarios for the vast majority of rookie TEs - the position is very demanding at the pro level and it simply takes more than 1 training camp and regular season to absorb all the duties that are asked of a pro TE. Among the 2008 draftees, expect 300+ and 1-2 TDs to be a ceiling when you are crafting your projections.

New Seahawk John Carlson will battle Jeb Putzier for playing time during 2008, and could end up starting for Seattle sooner rather than later. He is the TE prospect who landed in the best situation (such as it is) from the fantasy perspective.

Dustin Keller arrives to the Jets via a first round pick, but he’ll have to earn his way into the starting lineup - solid-but-unspectacular Chris Baker has scored 4 TDs in 2 of the past 4 seasons, and posted 41/409/3 last year. Keller will have the opportunity to learn the position from Baker and another veteran TE, Bubba Franks, this season. Keller is a guy to watch as the year progresses - he might be worth a flyer in free agency late in the season (just before fantasy playoffs) if he manages to earn playing time during 2008.

The NFL Draft is an exciting time of year for football junkies, but it is just the beginning of a long process. Don’t let your draft weekend enthusiasm drown out your better judgement as you prepare your preliminary draft lists for 2008. We have yet to get an inkling who among the draftees will fulfill their promise, which ones will outperform expectations - and how many will go bust in their first season as a pro football players.

RB Rashard Mendenhall was having a tough Day One; having been one of the obvious players to drop today. Thought to be the 2nd RB off the board by many, he comes off the board after McFadden, Stewart and Jones. Making matters worse for him, he’s joining a team that has a young franchise runner in place in Willie Parker. However, Parker isn’t the biggest guy and the Steelers have use for a backup of Mendenhall’s caliber.

Fantasy Impact: Parker got hurt last year and the Steelers didn’t really have an answer. This solves that worry and, also gives them a potential 20-carry back in a year or two depending on whether they want to commit financially to Parker a few years down the line. Given his size and running style, Mendenhall could play a key role in short yardage and at the goal line, which would somewhat diminish Willie Parker’s fantasy value.