LOS ANGELES -- There's a bit of an experience gap between the two starting pitchers in Saturday's D-backs-Dodgers game.
On the one hand, you have the Dodgers' Dan Haren, a veteran of 12 big league seasons, who will be making the 320th start of his career.
And then you have the D-backs' Mike Bolsinger, who will make his first big league start under the bright lights of Dodger Stadium.
Bolsinger, a 15th-round selection in the 2010 First-Year Player Draft, made his debut last Monday with a three-inning relief stint against the Mets. He is taking the place of Trevor Cahill in the rotation.
The relief outing should help Bolsinger when he takes the mound Saturday, because he now knows that there is definitely a different pace to the game than there was with Triple-A Reno.
"I think it's big because you know what to expect," Bolsinger said. "You know the tempo of the game. It just seems the game gets faster here. There's more going on. You've got to be aware of it and make sure you slow it down."
This will be Haren's second straight start against the D-backs, and he got the win in the last one, but the D-backs made him earn it during 5 2/3 difficult innings.
"I could tell from the start it was going to be a battle," Haren said after the game. "I was able to get through it. I don't know how. I face them again [Saturday] and I have to have better stuff than this."
Bolsinger's biggest competition could come from the moment itself. When he got to historic Dodger Stadium on Monday and was running in the outfield, he stopped and looked around at the empty ballpark.
"I thought, 'This can't be real,'" he said.
D-backs: Familiar surroundings for Trumbo
Outfielder Mark Trumbo was born in Anaheim, Calif., and played for the Angels through the first four years of his career, so this trip is a homecoming for him.
Trumbo, who was out of the starting lineup Friday for the first time this season to make room for Cody Ross, is expected to be back Saturday.
Trumbo is among the Major League leaders in home runs with six and RBIs with 18.
Dodgers: Down to one lefty in 'pen
J.P. Howell, the lone left-hander in the bullpen, is not your typical lefty specialist.
"We feel like he can get left-handers and right-handers out," manager Don Mattingly said.
It also helps that Mattingly feels comfortable using right-handers Chris Withrow and Jamey Wright against left-handed batters.
• Aaron Hill is 8-for-25 (.320) in his career against Haren with two doubles, two triples and a home run.
• Chris Owings is 4-for-6 in his career against Haren.
• Dodgers lefty Hyun-Jin Ryu pledged a $100,000 donation via his foundation to a help those affected by the SEWOL ferry disaster in his native South Korea.
• Mattingly continues to dispel any notion he's concerned about closer Kenley Jansen (5.00 ERA, .325 opponents average, entering Friday).
"I have no real concerns, I'm not thinking about doing anything any different," Mattingly said. "He hit 100 [mph] the other day. It's going forwards, not backwards. The ball is coming out of his hand fine."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.