The Seattle Mariners reinstated second baseman Jorge Polanco (hamstring) from the 10-day injured list ahead of the team's series opener against the Tampa Bay Rays. Polanco has been out since May 26 due to a right hamstring strain, but he should resume his everyday role as the Mariners' second baseman upon his return. It has been a rough start to the year for the 30-year-old at the plate, as he is hitting just .195 with five home runs, two doubles, and 14 RBI in 46 games this season. Given his poor numbers in 2024, Polanco should likely be left on waivers in most fantasy leagues right now.

The Seattle Mariners optioned first baseman Tyler Locklear ahead of the team's series opener against the Tampa Bay Rays. With Jorge Polanco (hamstring) returning from the 10-day injured list, Seattle decided to send down its No. 8 prospect. Locklear started just once since June 17, so the first baseman should be getting more consistent reps in Triple-A. The 23-year-old hit just .200 with two home runs, one double, and three RBI across 11 games with the Mariners this season. With his demotion, he can be safely dropped in all formats.

Baltimore Orioles first baseman Ryan Mountcastle, rookie outfielder Colton Cowser and infielder Jorge Mateo are all out of Monday's lineup against the visiting Cleveland Guardians. Ryan O'Hearn is playing first base and batting third, rookie Heston Kjerstad is in left field and is batting fifth, and Ramon Urias is at third base and in the eight-hole against Guardians right-hander Tanner Bibee. Mountcastle is getting a routine day of rest after starting in each of the team's last nine games. Cowser is hitting .175 in June and has now been on the bench three of the last five times the club has faced a righty pitcher. The 24-year-old could see even less playing time if Kjerstad plays well upon his promotion. Mateo is on the bench for the third time in the last five games and is losing playing time to both Urias and Jordan Westburg.

Tampa Bay Rays second baseman Brandon Lowe (toe) remains out of the starting lineup for Monday's series opener against the visiting Seattle Mariners. Richie Palacios will take his place at second base and will bat fifth against Mariners right-hander Bryan Woo. It's not that big of a surprise that Lowe is still sidelined after fracturing his right pinkie toe when he was hit by a pitch in Saturday's loss to the Pittsburgh Pirates. For now, the Rays and the 29-year-old are hoping that he can avoid a trip to the injured list, but we'll see how long that lasts. The former third-round selection in 2015 out of Maryland still has intriguing pop from the second base position, but injuries continue to get in the way. Lowe is hitting only .217 (25-for-115) on the year with five homers, 22 RBI and 17 runs scored. Palacios is mainly useful for his speed (11 stolen bases) in deeper fantasy leagues.

Cleveland Guardians catcher/outfielder David Fry (elbow) is serving as the designated hitter and will bat fifth for the team in Monday's series opener against the hosting Baltimore Orioles and rookie left-hander Cade Povich. Fry left the series finale on Sunday against the Toronto Blue Jays early with right-elbow inflammation, but he's back in action a day later, albeit as the DH. The 28-year-old will continue to be an option for Cleveland at both catcher and in the outfield once he gets past his elbow injury. The former seventh-round pick of the Milwaukee Brewers in 2018 has been a revelation this year for fantasy managers that plucked him off the waiver wire, as he's hitting .312/.429/.526 with a .955 OPS, eight homers, 31 RBI and four steals on the year. He's started coming back down to Earth this month, though, going 11-for-49 (.225) with no homers, four RBI and 10 K's in 15 games.