Jurrjens was summoned Saturday to be the long man in the bullpen after Kevin Gausman pitched 4 1/3 innings on Friday night.
Manager Buck Showalter said, "I just felt like we needed some coverage in our bullpen."
Ishikawa had two hits in 17 at-bats with Baltimore. He was not bitter. He said, "I think it might have been different if I had played a lot better, so I can't fault them for it."
Ishikawa said his family had just joined him in Baltimore, so instead of facing the Yankees on Sunday, he plans to visit the zoo.
There's a chance he could be traded, waived or accept an assignment to Norfolk.