Yeah he played for Stanford under Harbaugh. The story I heard is that Sherman was a WR, and Harbaugh moved him to CB his last season in a move to push him out.
Add that to the fact that he got drafted in the 5th round, Sherman is pretty salty for that.
Sherman should be thanking Harbaugh for putting him in the position where he could be an NFL star.
Ugly, ungrateful motherfukker.