And with the score 3-3 and two men on in the seventh inning, it was Trumbo who broke the tie with a single to center to score Albert Pujols and give the Angels (40-33) the go-ahead run.
The victory gave the Angels their sixth straight series win against the Dodgers. They haven't lost a series against their Southern California rivals since 2009.
In an outfield that consists of Trumbo, Torii Hunter and American League Rookie of the Year candidate Mike Trout, Bourjos hasn't seen much playing time of late. His start on Sunday was just his fourth this month.
Though it isn't exactly an ideal situation for the 25-year-old, he said he has accepted his role as an off-the-bench guy for now. It's all he can do.
"You can't go out there and say, 'No matter what I do, I'm not going to play the next day.' That's not a good mindset," Bourjos said. "You've got to go out there and try to get as many hits as you can and prove that you can play."
Before the Angels' bullpen came in to extend its scoreless streak to 18 2/3 innings -- with lefty Scott Downs earning his first win of the season -- starter Garrett Richards went 6 2/3 innings, giving up three runs on nine hits and two walks while striking out five in the no-decision. Prior to Sunday's game, Richards had not surrendered more than one earned run in any of his three starts.
In his last start against the Dodgers (43-30) on June 11, Richards had to pitch out of multiple jams in order to get through the fifth inning. And it was nearly the same story on Sunday.
The righty allowed baserunners in every inning except one but managed to get out of trouble by forcing double-play balls in the third and fifth innings with two men on base.
"Garrett's a 'stuff' guy," Angels manager Mike Scioscia said. "He's got great stuff, and when he gets movement on that fastball, he's going to be able to get the double-play ball. It's a tough left-handed lineup to get through."
Richards had a chance to earn the win when the Angels had a chance to add to a 3-2 lead in the fifth inning.
One batter after Pujols had knocked home Trout from second to give the Angels the lead, Pujols was thrown out at third by Dodgers left fielder Juan Rivera with one out trying to make it from first on a Kendrys Morales hit. Scioscia was ejected for arguing the play with third-base umpire Dan Iassogna.
"I thought he was safe but haven't had a chance to look at it [again]," Scioscia said. You're going to get some calls, you're not going to get some calls. That's part of the game. You have to play at a high enough level to absorb them. If we didn't have some calls that didn't go our way, this afternoon we played at a high enough level to absorb it."
The Angels were resilient over the weekend, coming back from early deficits in two of the three games. It's something the team wouldn't have done in the early part of the season, Hunter said on Friday. But now that the team has won 11 of its last 15 games, both facets of the team -- pitching and now offense -- are finally starting to click at the same time.
"We didn't have the offensive depth and certainly weren't productive enough to come back in games," Scioscia said of his team in April. "If we didn't get a break during the game, it was tough for us to win. We've definitely righted that ship, and are better at setting the table and are driving the ball better on the offensive side."