Through games played on May 31, 2011, 4 ...
1) Derek Jeter of the Yankees with 2983 hits and 328 stolen bases.
2) Omar Vizquel of the White Sox with 2819 hits and 401 stolen bases.
3) Alex Rodriguez of the Yankees with 2726 hits and 304 stolen bases.
4) Johnny Damon of the Rays with 2626 hits and 391 stolen bases.
Only two -- Henry Aaron and Willie Mays.
Henry Arron and Albert Pujols.
It would score 4 (four) runs.
two players - Ty Cobb and Pete Rose
1760, 55 Players on a roster, 32 teams, 55 x 32 = 1760. However, there can be an unlimited amount of free agents so the number of players in the NFL can constantly change.
4 runs would score: the 3 runners on base plus the batter who hit the home run. Grand! Slam!