PHOENIX -- Josh Collmenter is joining the D-backs' starting rotation, and Randall Delgado is moving to the bullpen.
D-backs manager Kirk Gibson made the announcement following Arizona's 6-0 loss to the Dodgers on Friday night.
Collmenter will start Monday night against the Mets, which is the day Bronson Arroyo was slated to start.
Arroyo, who was behind the rest of the starters when the season began due to a back issue during Spring Training, will get an extra day of rest and start Tuesday night.
Delgado, who lasted just 3 1/3 innings in his start Thursday night, will try and get things figured out in the bullpen.
"You guys know we need innings out of guys, and he gives us a chance to win a ballgame," Gibson said of Collmenter. "He's shown that in 2011, he's done it out of the bullpen. Just looking at our options, we think that's the smartest way to go. We're going to go with this and see how it works."
After extra effort, D-backs allowed to arrive late
PHOENIX -- After a night game that went extra innings on Thursday in San Francisco, the D-backs arrived back home in the wee hours of the morning Friday following their win against the Giants.
"Everybody got to sleep around 4 a.m.," D-backs manager Kirk Gibson said.
With that in mind, Gibson ordered the clubhouse closed in the afternoon with players not having to be dressed until 5 p.m. MST for the 6:40 p.m. game against the Dodgers.
"These guys are really good at being prepared to play and getting themselves loosened up, so we were comfortable with that," Gibson said. "Just thought that was more beneficial than coming in and getting on the field and forcing people to get in here."
It was a gesture that went over big with his players, who came in on their own and got their usual batting-practice swings in the indoor cage rather than on the field.
"Everybody is still going to take as many [swings] as they probably would," shortstop Cliff Pennington said. "But they just get to have a little mental break on the way. It's very nice."
Pool incident isn't motivating D-backs vs. LA
PHOENIX -- D-backs manager Kirk Gibson probably should have expected the question.
The Dodgers on Friday made their first appearance at Chase Field since last September, when they angered the D-backs by jumping into the pool located beyond the wall in right-center after they clinched the National League West championship.
"I know it's great for you guys to talk about it," Gibson told reporters. "Nothing's changed. Nobody liked the fact they jumped in our pool. It's not life changing though. We need to beat the Dodgers as they are this year. They're a very good team, they're very well managed, they're very well coached. That's what our focus is on, nothing more. There's nothing extra."
Gibson said the games against the Dodgers were no more important than the division games the D-backs played against the Rockies and Giants on their just-completed six-game road trip.
"We tried to beat the Rockies when we were there, we were unable to win that series," Gibson said. "We tried to win the Giants series, we did that. We want to beat the Dodgers and win this series, too. You've just got to keep trucking ahead and stay focused on your task at your hand. There's nothing else, there really is nothing else to it."
D-backs to celebrate life of Jackie Robinson
PHOENIX -- April 15 is Jackie Robinson Day throughout Major League Baseball, and the D-backs will celebrate Robinson's life with a series of events when they play host to the Mets on Tuesday night.
The celebration actually began Friday when the D-backs became the first team to host a pair of Negro Leagues Baseball Museum travel exhibits called "They Were All-Stars" and "Times, Teams and Talent." The two exhibits will be on display throughout the six-game homestand.
On Tuesday, the D-backs will recognize an Arizona Jackie Robinson Foundation scholar, Lucia Carbajal, and the Major League Baseball All-Star Arizona Diamondbacks Branch Boys & Girls Club Youth of the Year, Edreyse Sharkey, during a special pregame ceremony.
The D-backs will contribute $4,200 -- in honor of Robinson's No. 42 -- to both the Jackie Robinson Foundation and MLB All-Star Arizona Diamondbacks Branch Boys & Girls Club.
In addition, several Jackie Robinson cards and Negro League All-Star baseball cards from D-backs managing general partner Ken Kendrick's renowned collection will be on display next to the traveling exhibits.
D-backs team president and CEO Derrick Hall serves on the On-Field Diversity Task Force that was established by MLB Commissioner Bud Selig to focus on the myriad of issues influencing on-field diversity at all levels of baseball.
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.