As the Big 12 prepares to transition into a new era, Oklahoma State coach Mike Gundy stands among the longest-tenured coaches in the league. Gundy has been the head man at his alma mater since the 2005 season, and is preparing to enter his 20th year at the helm. In that time, he has seen the departure and return of Colorado, as well the his long time rival Oklahoma opting to leave for the SEC and several other comings and goings of schools. Speaking on the Always College Football podcast on ESPN, the Cowboys coach revealed his involvement in discussions with other coaches in the conference. “O…