PHOENIX (AP) — Junior Lake’s big day helped bail out Jason Hammel.

The Cubs’ starting pitcher had a shaky outing Sunday, but managed to limit the damage while Lake hit three of Chicago’s six home runs and finished with six RBIs in a 10-6 victory over an Oakland Athletics split squad.

Hammel gave up eight hits and walked three in 4 2/3 innings. But the A’s, who stranded 12 runners, scored two in the first and no more against the Cubs right-hander.

“This game is a prime example,” Hammel said. “Find a way. In games where we’re not looking the best, or not at top potential, we can make a run out of something and then we put a five-spot right there.”

A’s starter Jesse Chavez continued his outstanding performance through the first five innings — a spring that pushed the right-hander into the No. 3 spot in Oakland’s rotation as announced by manager Bob Melvin earlier Sunday. Sonny Gray will be the opening day starter.

Chavez gave up just two singles and a walk before the Cubs’ big sixth. Darwin Barney singled and Chris Coghlan brought him home with a double.

 Emilio Bonifacio singled with Coghlan holding at third, and Lake followed with his first home run of the spring to put Chicago ahead to stay at 4-2. Luis Valbuena homered on Chavez’s very next pitch.

Lake’s second homer, off Drew Pomeranz, with a man on in the seventh extended the lead to 7-2. Oakland scored three times in its half of the seventh with a pair of errors by third baseman Mike Olt extending the rally. Left fielder Darnell McDonald fell while chasing Tyler Ladendorf’s deep fly, and the ball bounced over the wall for a ground-rule double.

But in the eighth, Olt homered for the fifth time in the spring to get a run back for the Cubs. Lake and Valbuena connected again in the ninth off Fernando Nieve. Valbuena’s second homer gave him six, passing Olt and Javier Baez for the Cubs’ spring lead.