Arcadia football coach Jim Ellison has resigned for personal reasons, athletic director Kevin Mooney said.
The Titans went 10-3 last season and advanced to the Division III semifinals before getting knocked off by Glendale Cactus.
Arcadia is currently at football camp in Payson and begins the season on Aug. 24 against Coronado. Ellison went 31-16 in four years as coach.
"We appreciate the contributions he made the last four years," Mooney said.
Ellison did not return a voice mail seeking comment.
Mooney said offensive coordinator Lenny Abt will take over as interim coach. The school will search for a permanent replacement after the season ends.
Mooney and principal Anne-Marie Woolsey went up to the camp on Tuesday and notified the team of Ellison's resignation.
"We were very impressed by (the players') mood and spirit," Mooney said.