The touchdown came after the Vandals (6-7, 3-5 WAC) blocked a field goal attempt by the Spartans' Harrison Waid as time ran out in regulation to send the game into extra play.
Waid kicked a 39-yard field goal to give the Spartans (1-12, 0-8) a 23-20 lead in the OT period but the Vandals responded with the TD.
Enderle finished throwing 16 for 30 for 250 yards. Greenwood led Idaho in receiving with four catches for 86 yards while Troy Vital led on the ground with 76 yards.
Idaho took its first lead of the game when Justin Veltung scored off a 37-yard run with 14:50 left in the fourth quarter to give the Vandals a 17-13 lead.
Trey Farquhar added a 32-yard field goal with 7:14 to go, giving Idaho a 20-13 lead.
SJSU's Ryan Otten snagged a 6-yard pass from La Secla with 4:35 left to tie the game at 20.
The Spartans put up 496 yards of offense to Idaho's 421, but Waid proved to be the difference. He missed an extra point attempt in the third quarter could have won the game in regulation if his attempted wasn't blocked.
Arizona linebacker Scooby Wright's left knee injury is not season-ending, according to an MRI Wright had after Thursday night's opening win over UTSA, sources told ESPN's Brett McMurphy.
Syracuse starting quarterback Terrel Hunt has a significant injury to his right Achilles, head coach Scott Shafer said after the Orange's season-opening 47-0 rout of Rhode Island.
The Mountain West told ESPN's Brett McMurphy that officials correctly ruled the final play that kept Colorado from getting a potential game-tying touchdown against Hawaii before time expired.
ESPN 300 running back Elijah Holyfield, the son of former heavyweight boxing champion Evander Holyfield, has decided to stay home and attend Georgia, he announced Friday.
Miami reserve linebacker Al-Quadin Muhammad has been suspended for the season opener against Bethune-Cookman on Saturday for a violation of team rules, a source confirmed to ESPN.com
Phil Steele gives his 10 best Week 1 college football bets, including a play on Auburn-Louisville and Wisconsin-Alabama.