Rumbelow cleared waivers Wednesday and was outrighted to Triple-A Tacoma. It's hardly surprising that Rumbelow's 9.19 Triple-A ERA wasn't appealing enough for another team to claim him off waivers. He'll remain in the Mariners organization but doesn't appear to be close to returning to the big leagues.
Rumbelow was designated for assignment by the Mariners on Friday. Rumbelow made three appearances for the Mariners back in March but was removed from the 25-man roster after allowing four runs while recording just four outs. Since then, he's allowed 16 earned runs in 15.2 frames for Triple-A Tacoma, leading to him being removed from the 40-man roster as well. Andrew Moore was claimed off waivers in a corresponding move.
Rumbelow was optioned to Triple-A Tacoma on Wednesday, Greg Johns of MLB.com reports. Rumbelow has one save in his three appearances but has also allowed four runs in just 1.1 innings of work. As a mediocre reliever with options, he'll likely bounce between Seattle and Tacoma for much of the season. The move clears room on the 25-man roster for Connor Sadzeck, who was acquired in a trade with Texas on Monday.
Rumbelow was recalled from Double-A Arkansas on Tuesday. The 27-year-old pitched 13.1 innings for the Mariners earlier in the season, recording a 6.75 ERA while allowing six homers. He'll be one of many low-leverage arms in the team's expanded September bullpen.
Rumbelow was optioned to Double-A Arkansas on Tuesday, Ryan Divish of The Seattle Times reports. Rumbelow made just one appearance during his most recent stint with the Mariners, allowing one run across three innings of relief against the Astros last week. He now owns an unremarkable 6.75 ERA across 13.1 big-league innings this season. The 26-year-old should be back in the majors when a fresh bullpen arm is needed.