Oakland A’s release Marco Estrada

Stan Szeto-USA TODAY Sports The Oakland A’s released starting pitcher Marco Estrada on Tuesday, the team announced.

The A’s signed Estrada as a free agent last winter to a one-year, $4 million contract. His first three starts were solid, but then he exploded his next two times out to the tune of 13 total runs. The culprit turned out to be his back, which has bothered him for years now, and he landed on the injured list on April 17 and hasn’t returned to the majors since.

Estrada, 2019: 6.85 ERA, 23\u2154 ip, 11 Ks, 8 BB, 7 HR, 7.53 FIP

The right-hander, who turned 36 years old in July, was on the 60-day IL, so he wasn’t taking a spot on the 40-man roster and this move therefore does not clear…