But nearly two months later, both clubs seem to be benefiting from the move.
After batting .143 in May when he first joined the team, Padres second baseman Alexi Amarista hit .341 in June and is off to a hot start in July with five hits in his first nine at-bats, including a homer and three RBIs Monday against the D-backs.
"He's been a nice pick-up for us," Padres manager Bud Black said. "I think the deal will probably be best served in a couple years."
In Anaheim, Frieri has yet to allow a run in 24 1/3 innings with the Angels. For his efforts the 26-year-old was named one of five candidates for the American League Final Vote contest.
"That's incredible," Black said of Frieri's run. "We're happy for him."
While Amarista and Frieri are tearing up the big leagues, the other player the Padres got in the deal, pitcher Donn Roach, made a glorious Double-A starting debut Monday.
The 22-year-old hurled six no-hit innings for San Antonio in the Missions' 3-2 victory.
"Our people like this kid Roach," Black said.