We also had 3 NFL lbs starting early in Mendenhall's career at BYU. Kehl was the main one (3rd round pick?) but there were two others on that team that also made 53-man rosters. At one point all three were with the Rams and someone here posted a pic of their lockers together.
Great LB room this year, but BYU has historically had great LBs. Great to see this tradition continue!