Yoder said he will continue teaching at La Cañada High while he pursues a master's degree and spends more time with his wife.
"For me it's a huge loss," Franzen said. "It was to the point where it was his program and not someone else's. Now we have to start that process all over again and football takes a little longer than other sports for whatever reason."
Franzen said the head coaching position will be offered "in house" to La Cañada High teachers for 10 days, according to labor law. A search will begin after winter break if no one applies within the time period.
"There is a little rush [to find a coach] because you want to have someone in place for spring football," Franzen said. "We'd like to have a coach in place as soon as possible."
Yoder guided the Spartans to a 3-7, 2-3 in Rio Hondo League record this past season. La Cañada just missed out on a possible playoff berth after falling to San Marino on the road, 37-13, on Nov. 10. He led the Spartans to playoff berths in 2009 and 2010.
In his three years at La Cañada, Yoder posted a 13-18 overall and 8-7 in league career record. His finest season came in 2010 when the Spartans finished with a 5-6, 3-2 mark and placed third in league.
"It's been great," Yoder said of his past seven years with La Cañada football. "The community, parents and school have all been really supportive of me. It was a very difficult decision to leave."