http://www.altoonamirror.com/page/content.detail/id/521881.html?nav=5017Broken down by number of NFL starts (since the NFL-AFL merger) by school. Current as of before this season.
Most games NFL games started by alums:
Purdue 704
Washington 617
Miami, Fla. 577
Notre Dame 574
Stanford 567
Alabama 495
UCLA 482
USC 463
Oregon 438
Michigan 428
Maryland 402
California 381
BYU 373
Arizona State 358
Washington State 333
Illinois 284
Pittsburgh 271
Southern Mississippi 270
San Jose State 265
Boston College 259
Georgia 254
N.C. State 250
Kansas State 249
Penn State 241
Tennessee 235
Florida State 233
Notice you see no other B12 schools on this list.
Also of note in the article:
Only nebraska(6) and baylor(5) have produced more QB's who have started games in the NFL, but no other school has as many QB starts as K-State, which has 2 of the three QB's (Grogan and Dickey) with 100+ starts (the other is

john hadl

). kordell stewart is 4th with 87.
texas has only produced 2 QB's who have started an NFL game: chrissy simms and vince young. No one before 2004.
oklahoma has NEVER produced a QB who has started a game in the NFL. Even Wichita St produced one before getting the axe.
One of our QB's, Dan Manucci, got his one and only start as a scab in the strike year of 1987, seven years after his previous NFL game.
edit: this list is QB's only.