Vanderbilt gave every guy in the quarterback an opportunity to win the starting role. Head coach Clark Lea seems to be down to two guys, though. Both are transfers, with former New Mexico State QB Diego Pavia and Nate Johnson, formerly of Utah, having the best chance of starting Aug. 31 against Virginia Tech. Lea gave an official update on where the quarterback competition stands, saying a scrimmage this upcoming weekend will be a big indicator. While Vanderbilt does not plan to make an official announcement anytime soon, Lea and his coaching staff are having discussions based on practices. “W…