TUSCALOOSA, Ala. (AP) - Trent Richardson flashed speed and power at Alabama's second pro day.

The former Crimson Tide tailback, linebacker Courtney Upshaw and safety Mark Barron worked out for NFL scouts, general managers and coaches on Thursday. All three are projected first-round draft picks.

The 227-pound Richardson says he bench-pressed 225 pounds 25 times. NFL.com says he was unofficially clocked from 4.45-4.49 in the 40.

Richardson is considered the top running back available and a potential top 5 pick. He even knocked down Cleveland Browns running backs coach Gary Brown in a blocking drill.

The Browns, who have the fourth pick and need a tailback, were also represented by head coach Pat Shurmur and general manager Tom Heckert.

Richardson, Upshaw and Barron all were recovering from injuries at the NFL combine.

Read more: http://sportsillustrated.cnn.com/2012/football/ncaa/wires/03/29/2060.ap.fbc.alabama.pro.day.0175/index.html#ixzz1qXKB6kBO

The final phase of scouting for 2012 begins this week with the Scouting Combine in Indianapolis. Now that the season and all of the following All Star games are complete, it's time to revisit and reshuffle the big board. Here are the top 50 players on SI.com's big board as we get ready for a busy week ahead (* denotes underclassman).

1. Andrew Luck, QB, Stanford* -- Luck has been the top NFL prospect in the nation for almost two years and nothing has changed. He'll be the first player selected in the draft and the Indianapolis Colts will barely notice the bump in the road as they transition from the Peyton Manning era.

2. Matt Kalil, T, USC* -- Kalil's pass protection skills are on par with former Trojan great and All Pro tackle Tony Boselli. The junior needs to improve his run blocking, but possesses all the skills necessary to be a big-time left tackle in the NFL.

3. Trent Richardson, RB, Alabama* -- Richardson is the most complete running back in this draft, and likely the only first-round pick from the position. He's a versatile ball-carrier who also positively effects the game as a pass-catcher. The junior has the skills to immediately produce as a rookie in the NFL.

4. Robert Griffin, QB, Baylor* -- Griffin has the misfortune of being in a draft that includes Andrew Luck, the best quarterback prospect since Peyton Manning. Despite that, he's a legitimate franchise signal-caller and a great combination of athleticism, arm strength and maturity.

5. Quinton Coples, DL, North Carolina -- The top senior on this list is a pure dominator who can play several spots on the defensive line. He's a man amongst boys when on his game, but scouts question Coples' intensity on an every-down basis.

6. Justin Blackmon, WR, Oklahoma State* -- His game was NFL ready last year, but Blackmon decided to return to school to improve his skills as well as work on his degree. Blackmon matured last season as a player and person. His style reminds many of Terrell Owens.

7. Morris Claiborne, CB, LSU* -- Though not the caliber of athlete as former LSU star Patrick Peterson, the fifth pick in last April's draft, scouts think Claiborne is more polished in his ball skills. The junior has the ability to develop into a No. 1 corner for an NFL franchise.

8. Riley Reiff, T, Iowa* -- Reiff is a tremendous pass-blocking left tackle, though many scouts think he could shift to the right side. He possesses the footwork, body type and wherewithal to break into a starting lineup early into his rookie career.

9. Kendall Wright, WR, Baylor -- Wright was the top recipient of passes coming from Robert Griffin, and scouts love his game. He's a legitimate field-stretcher with polished receiver skills. Wright's name sits atop the wideout position on a number of draft boards around the league.

10. Melvin Ingram, DL-OLB, South Carolina -- Few defensive prospects raised their game and draft stock as Ingram did last season. He's a playmaker who stands out in almost every aspect of the defense, with his ability to make plays behind the line of scrimmage or out to the flanks.

11. David DeCastro, G, Stanford -- Andrew Luck's top blocker has been the dominant force on Stanford's offensive line the past two seasons. He's rightfully being compared to All Pro Steve Hutchinson and offers potential in a variety of NFL blocking schemes.

12. Michael Brockers, DL, LSU* -- Brockers capped off a tremendous sophomore season with an awesome showing in the national title game. He's an explosive interior lineman who eats up blocks and collapses the pocket.

13. Dre Kirkpatrick, CB, Alabama* -- Kirkpatrick is a feisty corner who physically beats down opponents to defend passes. He possesses outstanding size, continues to display improved ball skills and projects as a No. 1 cornerback in the NFL.

14. Fletcher Cox, DL, Mississippi State* -- Cox is one of the hidden values at the defensive line position. Scouts feel he's one of few available three-down defenders and offers the ability to play as many as four different positions on the defensive line.

15. Courtney Upshaw, DE-OLB, Alabama -- Upshaw was the feared pass-rusher in Alabama's suffocating defense, and scouts expect much the same from him at the next level. The lingering question is which position will Upshaw play at the next level, outside linebacker or defensive end? Or both?

on Gruden will remain in the ESPN "Monday Night Football" broadcast booth for another five seasons.

The former Tampa Bay Buccaneers and Oakland Raiders coach agreed to an exclusive contract with ESPN that begins in September 2012.

"I said I want to get good at this," Gruden said while preparing for the prime-time game at the New Jersey Meadowlands between the Dolphins and Jets. "I was serious about this from the day I started it and I am serious about wanting to get good at it.

"I spent 26 or 27 years in coaching, 18 of them in the NFL. I want to focus on this and get better every day." (MORE>>>)