The 6-foot-3, 220-pound Fields completed 27-of-39 passes for 328 yards and four touchdowns as a freshman.
Haskins announced his decision on Twitter, thanking his teammates and coaches at Ohio State.
Fields could be eligible in 2019 due to an intriguing loophole in the NCAA's transfer policy, with his lawyers poised to cite "egregious behavior" that made Fields uncomfortable at Georgia and forced his hand. There's no way Fields would go from sitting behind Fromm at Georgia to trying to battle an entrenched starter at OSU. Fields announced that he was heading to Ohio State last week. If Martell is going to be the starting quarterback at Ohio State, he's going to have to earn it.
The current Buckeye depth chart includes Haskins, who is expected to enter the NFL Draft, redshirt sophomore Tate Martell, who was a standout at Bishop Gorman High School in Las Vegas, and Matthew Baldwin. Eason did sit out the 2018 season, where as Fields intends to apply for a waiver to make him immediately eligible.
In addition to winning the Rose Bowl, Haskins finished third in Heisman Trophy voting.
Fields' most notable play of the season came in the SEC championship game loss to No. 1 Alabama, when he was used on a failed fake punt in the fourth quarter that set up the Crimson Tide's go-ahead touchdown.