"He's been pitching good all spring," Blue Jays manager John Gibbons said.
Ohka lowered his ERA to 2.84, giving up six hits and striking out four. He'll make one more start this spring.
"I don't know if it clinches a spot," general manager J.P. Ricciardi said. "It doesn't hurt him. He's right in the mix, and I am not going to commit right now. But he's right in line."
Reds starter Matt Belisle gave up two runs in four innings. The right-hander is competing with two others for the fifth spot in Cincinnati's rotation.
"I'm really not trying to know what's going on," said Belisle, who gave up four hits and struck out three. "I'm trying to focus on what's going on and what I need to do. Every year it seems to come down to the end."
Right-hander Kirk Saarloos, also in the mix for the Reds' fifth starter job, gave up an unearned run in the eighth.
Reds OF Ken Griffey Jr. didn't make the road trip after going 2-for-4 on Saturday in his first game of spring training. Manager Jerry Narron expects Griffey to play Monday against Boston, and plans on him getting 20-25 plate appearances before spring training ends. Griffey broke his left hand while playing with his children in December. ... 1B Scott Hatteberg (strained groin) was back in the lineup for the first time in four days, and C Javier Valentin (sore hamstring) returned for the first time in three days. ... Toronto RHP Brandon League was optioned to Triple-A Syracuse after seeing his fastball drop in velocity to the high 80 mph range. "I think it was the eight weeks of not throwing," said League, who worked out with weights in the offseason.