OAKLAND (CBS / AP) — The San Diego Padres acquired left-hander Drew Pomeranz, minor leaguer lefty Jose Torres and either a player to be named or cash from the Oakland Athletics on Wednesday for first baseman Yonder Alonso and reliever Marc Rzepczynski.

Pomeranz can either start or come out of the bullpen. He had surgery on his pitching shoulder in October and is expected to be ready by spring training. He was 5-6 with three saves and a 3.66 ERA in a career-high 53 appearances with nine starts spanning 86 innings for the A’s in 2015.

He went 10-10 with a 3.08 ERA in 73 games, including 19 starts, in two seasons with the A’s after he was acquired from Colorado following the 2013 season.

Torres pitched for the A’s Single-A affiliates at Beloit and Stockton last year and combined for a 4-5 record, eight saves and a 2.56 ERA in 47 relief appearances. He struck out 84 batters and surrendered just four home runs in 77.1 innings while holding the opposition to a .203 batting average. The 22-year-old left-hander was originally signed by the A’s in July 2010 as a non-drafted free agent out of Venezuela and pitched exclusively in relief for the first time in 2015.

The acquisition of Rzepczynski fills a need for the A’s in their bullpen. He began the 2015 season with Cleveland and was 2-3 with a 4.43 ERA in 45 games when he was traded to San Diego on July 31. He compiled a 7.36 ERA in 27 games with the Padres and combined for a 5.66 ERA in 72 games overall.

Alonso’s four seasons in San Diego were mostly marked by injuries. He played in 155 games in 2012 after being obtained from Cincinnati in a five-player deal, but has been limited to 97, 84 and 103 games due to various injuries.

Alonso batted.282 with five home runs and 31 RBIs in 2015. He was on the disabled list from May 9-June 1 with a bone bruise in his right shoulder and Sept. 14 through the end of the season with a lower back strain.

Alonso took over at first base for the Padres in 2012 after they traded Anthony Rizzo to the Chicago Cubs. Rizzo has gone on to become a two-time All-Star.

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