Well, I don't know exactly, but it couldn't be much more than 25 yards. You see, each team begins each possession on its opponent's 25 yard line, meaning they only have 25 yards to go to get a touchdown. Though I can't think of one at the moment, I'm sure it has happened several times that a team scored on their first play in an overtime period, with the score being, by definition, a 25-yard play. However, a play COULD be longer than 25 yards, if the offensive team had previously suffered a tackle for loss, or a penalty, pushing them back behind the 25 yard-line. For example, if, on the first play in the overtime period, the offense was penalized for holding, and lost 10 yards, then threw a touchdown pass on the next play, it would be a 35-yard play. Of course, it's technically possible for multiple sacks, or for large-yardage sacks, or multiple penalties, to move the ball waaaay behind the 25 yard-line. But most teams that are bad enough to allow big-yardage sacks or multiple sacks or multiple penalties in the same series usually aren't good enough to make the big plays. But I guess it's technically possible to have a 99-yard play in overtime. Then again, depending on what you call a "play"... What if the offensive team threw an interception in the end zone, and the defensive team ran it all the way back for a touchdown of their own? That would be 100+ yard play. Same thing if a blocked field goal/extra point was recovered by the defense in the end zone and run back to the other end zone (though it would be worth only 2 points in this case). I know for a fact that the latter happened in the 2000 Independence bowl (though I don't how far the blocked field goal was returned for). The game was tied at 35 at the end of regulation. Texas A&M got the ball first and scored a touchdown on the first play. However, the extra point attempt was blocked by Mississippi State and returned for a 2-point defensive conversion. MSU would go on to score a touchdown in their overtime possession, for a 43-41 victory. Again, I don't know how long a return MSU was credited for, but it had to be at least 90 yards. Of course, I'm just speculating as to the possibilities. If anyone has the definitive answer to the question, feel free to delete all my ramblings.
The record is 7.
The record for the most overtimes goes to Cincinnati beating Bradley in 7 OT's in 1981.
Barry Sanders with 39.
The record for the most overtimes goes to Cincinnati beating Bradley in 7 OT's in 1981. Wow 7 overtimes is alot.
Texas A&M 1991 - 56 sacks
Georgia Tech holds the record for most points in one game with 222 on Cumberland.
Pat White holds the QB rushing record.
Troy Edwards from La Tech vs. Nebraska 1998
Brett Favre holds that record.