Tebow ran for a touchdown and threw for another after replacing Kyle Orton to start the third quarter and had one final shot for the win before his pass fell incomplete in the end zone on the final play. The Chargers held on to win 29-24.
"Tim Tebow sparked the team today. (But) we haven't had a chance to watch the tape, we haven't had a chance to watch the film, we haven't had a chance to visit as a staff," coach John Fox said after the game. "So, I think at this point -- we have a bye week -- we do need to improve offensively, and it will all be up for discussion."
Denver doesn't play again until Oct. 23 when they'll visit Miami.
"I have no idea," Tebow said. "Thankfully, I don't have to make those decisions. Other people do that and I just go play football."
A fan favorite, Tebow was instantly greeted with a chorus of cheers as he trotted onto the field. The crowd was so loud that Tebow couldn't hear the play call in his helmet.
"He came and gave us a spark," running back Willis McGahee said. "That's Tim Tebow. Everybody has been cheering for him for the longest. Now he finally got in and moved the ball for us."
Tebow went three-and-out in his first series and finished 4 for 10 for 79 yards. He also ran six times for 38 yards.
Orton had a horrible first half, completing 6 of 13 passes for 34 yards. He also threw one interception.
Tebow was involved in one play during the first half, gaining 2 yards on a carry.
Information from The Associated Press contributed to this report.