Ryan Divish of the Tacoma News Tribune reports that Jesus Montero will be demoted to the Triple-A level.
Jesus Montero hit a go-ahead homer in the seventh inning of the Mariners' 2-1 win on Wednesday.
Jesus Montero went 2-for-4 with a two-run homer Saturday against the Angels.
Jesus Montero hit his first home run of the season in Monday's win over the Astros.
Mariners manager Eric Wedge said he plans to "mix and match" at catcher for a while.
Jesus Montero had a monster day against the Reds Monday, hitting a grand slam while plating a total of six runs as part of a 3-for-3 performance.
Jesus Montero did not suffer a concussion Saturday when he was hit in the head with a bat according to Mariners general manager Jack Zduriencik.
Jesus Montero left Saturday's game against the Indians after being hit in the head by the bat of Francisco Lindor.
According to Bill Madden, Teri Thompson and Michael O'Keeffe of the New York Daily News, Jesus Montero is named in records from the Miami-based Biogenesis clinic which reportedly distributed performance-enhancing drugs to players.
Jesus Montero went 3-for-4 with an RBI in a losing effort against the Red Sox on Tuesday.
Jesus Montero smacked a three-run homer Tuesday, helping the Mariners down the Indians 5-1.
Jesus Montero hit a pair of home runs Sunday, driving in three runs in Seattle's 4-1 win over the Angels.
Jesus Montero roped a pair of RBI singles in Sunday's loss to the Yankees.
Jesus Montero's two-run homer powered the Mariners to a 4-3 victory over the Royals in Seattle on Saturday.