The Padres outrighted outfielder Paul McAnulty and right-handed pitcher Carlos Guevara on Tuesday and replaced them with outfielder Chip Ambres and infielder Brian Myrow, both of whom were playing at Triple-A Portland.
San Diego also placed right-handed pitcher Brett Tomko on the 15-day disabled list with a strained right elbow (retroactive to July 1), replacing him with left-handed relief pitcher Joe Thatcher from Portland.
McAnulty, who made the team out of Spring Training and was hitting .207 in 135 at-bats with three home runs and 13 RBIs, cleared waivers Tuesday and will report to Triple-A Portland.
Guevara, who was 1-0 with a 5.84 ERA in 10 games, cleared waivers and, because he was a Rule 5 pick in December from the Reds, was acquired again from Cincinnati for a player to be named later or cash considerations.
As a Rule 5 pick, Guevara had to remain on San Diego's roster the entire season or be offered back to the Reds for $25,000. The Padres thought highly enough of Guevara to make a deal for him instead of simply offering him back.
McAnulty, a 12th-round pick in the 2002 Draft out of Long Beach State, has seen his playing time decrease dramatically since outfielder and top prospect Chase Headley joined the team on June 17.
McAnulty had one hit in his last 24 at-bats.
"It was a fun ride. ... Obviously, things didn't always go well for me but that is the way things shake out," McAnulty said. "Maybe it's time to start something new. Who knows? It could be here, could be somewhere else.
"They felt like they made the right decision. It's out of my hands. But now I will get to go down there [Portland] and play and maybe get back here or some other club."
Tomko, who signed a Major League contract with the Padres on June 27 after he was released by the Royals on June 12, appeared in two games before straining his elbow.
"When Brett came to us he had a little layoff from the Royals and he jumped right into those two innings [against Seattle on June 27] and overextended himself just a touch and threw the inning against the Rockies [June 30], felt some discomfort and wasn't able to get through it," Black said.
Thatcher, in his fourth stint with the Padres, was 4-0 with a 1.21 ERA over 19 appearances for Portland. He is 0-4 with a 7.40 ERA in 18 games with the Padres this season.