Conger finished 3-for-3 with a double and home run as the Angels jumped out to a 7-2 lead. Mike Trout made his Cactus League debut and went 1-for-2 with a walk and two runs scored, but the Halos again held out Albert Pujols and Josh Hamilton, who is expected in the lineup Tuesday.
Bonderman, 30, is attempting to come back from shoulder and elbow issues that hampered his final years with the Tigers. He gave up three runs on two hits and a walk, throwing 17 pitches in his lone inning.
"It wasn't the way I wanted it to go, but it was good to get out there and get my feet wet again," Bonderman said. "I got a little sped up and then hung a breaking ball, plain and simple. I didn't execute. But it was good to get that first one out of the way."
The Angels had their own comeback story with former Nationals closer Chad Cordero pitching for the first time since he appeared in nine games for the Mariners in 2010. Cordero gave up a leadoff home run to shortstop Brendan Ryan in the third inning, then retired three in a row.
Right-hander Garrett Richards pitched the first two innings for the Angels, allowing one run on two hits while throwing 26 pitches.
Ryan, making his first Cactus League start for Seattle after being held back in his return from offseason elbow surgery, went 1-for-2 before being replaced in the sixth inning. Second baseman Dustin Ackley also made his first spring appearance and went 1-for-3 with a triple off the left-center field wall in the fifth.
First baseman Justin Smoak was 2-for-2 with a double and is now 3-for-5 with a home run in two spring starts for the Mariners.
Right-hander Brandon Maurer, last year's Southern League Pitcher of the Year for Seattle's Double-A Jackson affiliate, threw a scoreless second inning his Mariners debut, while Andrew Carraway followed with two innings of one-run ball.
Up next for Mariners: Hisashi Iwakuma makes his first start of the spring as the Mariners hit the road to face the Brewers in Phoenix at 12:05 p.m. PT. Iwakuma, who established himself as a key member of the rotation in the second half of last season, is expected to throw one inning. He'll be followed by veteran left-hander Joe Saunders, who will make his Mariners debut after signing as a free agent. Oliver Perez and Kameron Loe are among the relievers expected to throw.