Timonthy Van Patten (Stegman) looks like Jason Segel
Timothy Van Patten aka Stegman in Class of 1984 :
http://4.bp.blogspot.com/-QifjgiIPx34/UhErpwWh-5I/AAAAAAAAA4s/LNqc4hDUSpg/s1600/JHBJBJHB.png
Jason Segel :
http://images2.fanpop.com/images/photos/3100000/Jason-jason-segel-3169364-411-600.jpg
** Now I am saying that they're identical twins. But I definitely see a resemblance and they could easily pass for brothers.