Siafa appeared in one game with the Nittany Lions over four years.
Allen leaves Penn State as the program's all-time leading rusher.
Build the Terry Smith statue immediately.
The 34 players that aren't playing mark the most out for a game this season.
"It's the next man up. This is today's college football."
Penn State will be without four starters on the offensive line in the Pinstripe Bowl.