Coaches praise Chris Polk and Chris Rainey after Tuesday’s Senior Bowl practice

Running backs Chris Rainey of Florida and Chris Polk of Washington were singled out by their head coaches for their outstanding play during Tuesday night's Senior Bowl press conferences. South squad coach Mike Shanahan (Redskins) praised Rainey for his ability to play running back, slot receiver, and split end. "He picked things up quickly," Shanahan said of the 5-foot-8, 178 pound Rainey, who rushed for 861 yards and caught 31 passes in his senior season at Florida. Leslie Frazier (Vikings), head coach of the North squad, spoke at length about Polk, a 224-pounder who registered back-to-back 1,400 yard seasons for the Huskies. "You can see that burst that he has," Frazier said. "He could run through some of those 'thud' tackles." Frazier also said that Polk has the potential to be an effective pass protector. Shanahan's praise for Rainey was surprising because the Redskins coach was reluctant to speak about any specific player after just...