Ryan Divish of the Tacoma News Tribune reports that Jesus Montero will be demoted to the Triple-A level.

It had to be done. Montero has been a major disappointment this season for Seattle, batting .208/.264/.327 with three home runs and nine RBI in 29 games. He also had an ugly set of stats in 2012 and could be kept down on the farm for a while. Divish writes that the M's "may have finally taken a step back from the idea that Montero will be a catcher at the big league level" and will play him primarily at first base and DH in Triple-A. Jesus Sucre will be promoted to fill the roster vacancy.

Jesus Montero hit a go-ahead homer in the seventh inning of the Mariners' 2-1 win on Wednesday.

The homer off A.J. Burnett was his third of the year. Montero also today threw out a basestealer for the first time in 16 attempts this year. He's caught just 15 percent of would-be basestealers (13 of 86) over the course of his career.

Jesus Montero went 2-for-4 with a two-run homer Saturday against the Angels.

Montero was responsible for the seventh homer surrendered by Joe Blanton this year. He's now homered twice in his last three games, which means he's probably due to start regaining some of the at-bats he's lost to Kelly Shoppach.

Mariners manager Eric Wedge said he plans to "mix and match" at catcher for a while.

Jesus Montero is hitting .211 with just one extra-base hit so far and has struggled defensively, while Kelly Shoppach is batting .389 (7-for-18). "We're going to mix and match with that," Wedge said. "Hopefully, keep Shop going, but also help to get Jesus going. What I wanted to do was play him (Montero) a little more early on, and see where it goes from there. Also, the physical and mental demands, I've talked to you about all along, I have to be aware of. We pushed him a little bit early. We're backing off a little bit now." Montero still needs to be owned in mixed leagues, but he's no better than a second catcher right now until he rights the ship and earns his manager's trust.

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.

Montero's slam came off of Wilkin De La Rosa. The Mariners' backstop is now batting .405 during Cactus League play and has a pair of homers and 10 RBI. He could be ready for a breakout season in 2013.

Jesus Montero left Saturday's game against the Indians after being hit in the head by the bat of Francisco Lindor.

There's no word yet as to the extent of the injury, but Montero was carted off the field. If it's just a welt, the 23-year-old should be fine by Opening Day. But Montero has had concussion issues before, so there's legitimate concern it might be something more. Stay tuned for updates on his status in the coming days.

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.

Montero has struggled to live up to the massive hype surrounding him this season, batting just .264 with 15 homers and 54 RBI. Still, he profiles as one of the finer young hitters in the league and should be treated as such in next spring's fantasy drafts.

Jesus Montero's two-run homer powered the Mariners to a 4-3 victory over the Royals in Seattle on Saturday.

Montero finished the night 2-for-3 with a run scored and two RBI, and also walked in the game. While his .265 average has been slightly disappointing, it's important to remember that he's still just 22-years-old and in his first full season of MLB action. He has displayed decent pop in his right-handed bat though, launching 10 homers and driving home 40 in 86 games on the year.

Jesus Montero went 3-for-4 with a walk, two runs scored, a double and two RBI in Tuesday's 9-6 victory over the Royals.

Montero's bat has come alive quickly since he suffered a concussion on July 4. In four games, he has gone 6-for-15 with three walks. The 22-year-old is hitting just .253/.294/.384 with eight homers overall and probably shouldn't be used in mixed fantasy leagues unless the format allows two backstops. Having said that, Montero needs to be monitored because of the potent potential of his bat and his eligibility at catcher.

Jesus Montero (concussion) is back in the Mariners' starting lineup Friday.

Montero hasn't played since suffering a mild concussion last Wednesday, but the All-Star break gave him the proper time to get well. The 22-year-old is hitting just .245/.281/.376 with eight homers and a .657 OPS in 73 games played this season.

Jesus Montero (concussion) has been cleared for baseball activities.

Montero hasn't played since suffering a mild concussion when he was hit in the mask by a foul tip last Wednesday. He managed to avoid a stint on the disabled list and should be available this weekend.

Jesus Montero (concussion) is expected to sit out his third straight game Sunday.

Montero is dealing with a mild concussion brought about by a foul tip off his facemask during Wednesday's game. He can be placed on the 7-day DL and still return for the start of the second half, but it doesn't appear that the Mariners plan to make a roster move at this time.

Jesus Montero (concussion) is not in Friday's lineup against the Athletics.

Montero was diagnosed with a mild concussion after taking a foul tip off his facemask during Wednesday's game. The Mariners don't think he will need a trip to the disabled list, but he could be rested through the weekend. Ichiro Suzuki will serve as the designated hitter Friday while Carlos Peguero plays right field.

Jesus Montero went 0-for-4 on Thursday and still has just one RBI in 87 at-bats this month.

Montero was at his best while Miguel Olivo was hurt and he got to do more catching. He's hitting just .203 with two homers in 143 at-bats as a DH this year, compared to .322 with six homers in 118 at-bats as a catcher. The deeper we get into the season with splits that large, the more it suggests it's not a fluke and that Montero really is a better hitter when he's playing the field.

Jesus Montero went 3-for-4 in Wednesday's shutout loss to the Padres.

The Mariners could muster just eight hits in getting blanked. Only Montero and Casper Wells contributed more than one knock. Montero has now hit safely in eight of his 10 June starts, roping more than hit four times in the process. For the season, he's batting .266/.303/.413.

Jesus Montero is not in Monday's lineup against the Angels.

We're assuming he's just getting the day off. Miguel Olivo will start behind the dish Monday while John Jaso serves as the designated hitter.

Jesus Montero went 3-for-4 with two walks, four runs scored, a home run and four RBI in Wednesday's 21-7 blitz of the Rangers.

The Mariners rolled up two touchdowns and a safety in the first three innings. Montero's biggest blast came in the second, where he tagged Derek Holland for a two-run bomb. Montero's seventh home run of the season was his first in nine games. Batting .257/.300/.429 through Seattle's first 53 games, Montero finishes May batting .255 to go along with 10 extra-base hits and 14 RBI.

Jesus Montero returned to the Mariners' lineup Saturday.

Montero had missed the previous two games with the DH spot unavailable this weekend. He'll start behind the plate for Jason Vargas and bat clean-up.

Jesus Montero is not in Thursday's lineup.

It's just a routine day off for Montero.