Penn (1-0) was knotted in a scoreless tie until the 116th minute when Rule scored on a breakaway at the 115:20 mark.
The senior, who has not played collegiately since 2006, tied
Brandon Wood (Sr., Smithfield, Utah, Iowa Western CC) for the team lead with three shots as Penn held a 14-12 edge in shots. After losing that battle 6-1 in the first half, the Statesmen rebounded to own an 11-5 advantage in the second stanza.
Tim Eyer (Jr., Palos Heights, Ill., Shepard HS) and
Jacob Plocher (Sr., West Plains, Mo., West Plains HS) added two shots apiece.
Tadeo Cavazos (Sr., Baytown, Texas, Lee HS) had five saves in the shutout.
It is the first time Penn has won its season opener since 2006, having tied its opponents the last two years.
Next: Penn travels to York, Neb. Sunday to face York in non-conference action at 2 p.m.