STANFORD (AP) — Stanford already had one of the Pac-12’s best recruiting classes lined up before high school players began sending in national letters of intent Wednesday.The Cardinal added to that with a major surprise on signing day.Riding the wave of a second straight conference championship, Stanford received a big boost when Solomon Thomas — one of the most sought-after defensive ends in the country — committed to the Cardinal. The 6-foot-3, 255-pounder from the Dallas suburb of Coppell selected Stanford over Arkansas and UCLA on national television by pulling out a small tree and putting on black “nerd” glasses with white tape over the bridge.“I thought it was awesome. I thought it was fun,” said Stanford coach David Shaw, who found out from Thomas two days earlier.