McSorley was named a second-team All-American ahead of his third season at the helm of Penn State's offense.
If the series is finalized, the Nittany Lions and Longhorns would likely square off in 2030 and 2031.
Brown is the fourth Penn State player to announce his retirement in the month of August.
No update on the injury was provided at photo day, but Stevens tweeted "Don’t Panic! ??" on Saturday afternoon.
Rahne made the list ahead of his first full season as Penn State's offensive coordinator.
For the second consecutive year, Sean Lee is the highest-rated Nittany Lion in the Madden video game.