ANAHEIM -- Former Angels reliever Rich Thompson, who was designated for assignment last week, was claimed off waivers by the Athletics on Friday.
The Angels tried to get something back for Thompson in a trade, then hoped he would slip through waivers so he could continue to pitch in their system, but the division-rival A's jumped at the opportunity to add him to a bullpen that ranks fifth in the Majors in ERA.
Thompson posted a 3.00 ERA in 44 appearances during his first full season in the Majors last year, but struggled in high-leverage situations and had been dealing with a pretty drastic drop in velocity this season.
The 27-year-old right-hander, who was signed by the Angels out of Australia in 2002, has been charged with four runs in 2 1/3 innings this season. The Angels designated him on Friday in order to call up rookie ground-ball pitcher David Carpenter.