There are a handful of guys in NCAA football every year that show how solid they can be as sprinters if the were to focus on that. The fastest 100s ever listed for soccer players have the top 15 rounded out in the 11s. Here is a link for just this year showing all NCAA football players that competed in track. Enjoy.
http://www.ustfccca.org/meets-results/outdoor-track-field-bests-by-collegiate-football-playersAlso, here is an article Flotrack did on NFL players in Track:
http://www.ustfccca.org/meets-results/outdoor-track-field-bests-by-collegiate-football-playersYou're being silly, All these guys would beat most soccer players 400m and under:
NFL Player Track Times
100m:
10.01 - Jacoby Ford (WR, Clemson - Oakland Raiders, 23 g)
10.06 - Bob Hayes (WR, Florida A&M - Dallas/San Fran, Hall of Fame)
10.06 - Ron Brown (WR, Arizona St - LA Rams/Raiders, 100 g)
10.07 - Alvis Whitted (WR, NC State - Jacksonville/Oakland, 122 g)
10.08 - Darrell Green (CB, Texas A&I - Washington Redskins, Hall of Fame)
10.09 - Sam Graddy (WR, Tennessee - Denver/LA Raiders, 43 g)
10.10 - Willie Gault (WR, Tennessee - Chicago/LA Raiders, 170 g)
10.11 - Mike Miller (WR, Tennessee - NY Giants/New Orleans, 16 g)
10.11 - Curtis Dickey (RB, Texas A&M - Balt/Ind/Clev, 85 g)
10.14 - James Trapp (CB, Clemson - Raiders/Balt/Jkv, 149 g)
hand timing:
10.0 - Cliff Branch (WR, Colorado - Oakland/LA Raiders, 4 Pro Bowls)
Other notables
10.01 - Jeff Demps (RB, Florida - New England Pats)
10.23 - Herschel Walker (RB, Georgia - 6 teams, 2 Pro Bowls)
10.26 - Deion Sanders (CB/WR, Florida St - 5 teams, Hall of Fame)
10.44 - Bo Jackson (RB, Auburn - LA Raiders, 1 Pro Bowl)
10.3h - O.J. Simpson (RB, USC – Buffalo/San Fran, Hall of Fame)
200m:
20.01 - Michael Bates (RB, Arizona - 5 teams, 5 Pro Bowls)
20.15 (A) - Mike Miller (WR, Tennessee - NY Giants/New Orleans, 16 g)
20.17 - James Trapp (CB, Clemson - Raiders/Balt/Jkv, 149 g)
20.19 - Phil Epps (WR, TCU - Green Bay/ NY Jets, 95 g)
20.23 - Michael Timpson (WR, Penn State - NE/Chi/Phi, 116 g)
20.27 - Danny Peebles (WR, NC State - Tampa Bay/Cleveland, 30 g)
20.28 - Tony Jones (WR, Texas - Houston/Atlanta, 43 g)
20.29 - Alvis Whitted (WR, NC State - Jacksonville/Oakland, 122 g)
20.30 - Sam Graddy (WR, Tennessee - Denver/LA Raiders, 43 g)
20.32 - Jerome Mathis (WR, Hampton - Houston Texans, 1 Pro Bowl)
Other notables
20.76 - Deion Sanders (CB/WR, Florida St - 5 teams, Hall of Fame)
400m:
44.94 - Rod Jones (CB, SMU - Tamba Bay/Cincinnati, 146 g)
44.98* - Larry Jones (DB, Truman St - Washington/San Fran, 51 g)
45.17 - Travis Hannah (WR, USC - Houston Oilers, 37 g)
45.38 - Patrick Johnson (WR, Oregon - Balt/Wash/Jkv/Edm, 70 g)
45.69 - Scott Turner (DB, Illinois - Wash/SD/Denver, 101 g)
45.73 - Robert Smith (RB, Ohio State - Minnesota Vikings, 2 Pro Bowls)
45.76 - Ed Hervey (WR, USC - Edmonton Eskimos, 2x CFL All-Star)
45.88 - Alvis Whitted (WR, NC State - Jacksonville/Oakland, 122 g)
45.91 - Johnny Thomas (DB, Baylor - Wash/SD/Clev/Phi, 94 g)
46.02 - Russell Carter (DB, SMU - NY Jets/LA Raiders, 64 g)
hand timing:
45.4 - Henry Carr (DB, Arizona St - NY Giants, 37 g)
45.5* - Karl Farmer (WR, Pittsburgh - Atlanta/Tampa Bay, 17 g)
45.9 - Darrell Green (CB, Texas A&I - Washington Redskins, Hall of Fame)
Other notables
46.6h - Ollie Matson (RB, San Francisco - 4 teams, Hall of Fame)
That being said, of the ball sports soccer plyers would probably adjust the best to distance training.