Fantasy baseball: What to expect from Red Sox prospect Marcelo Mayer

Boston Red Sox SS prospect Marcelo Mayer is getting the call to the major leagues, as starting 3B Alex Bregman (calf) is headed to the injured list. Fantasy managers should not expect Mayer, 22, to replace Bregman’s excellent numbers (.938 OPS), but he should see opportunity for playing time over the likes of Nick Sogard and Abraham Toro. Mayer is an excellent defensive shortstop, but he has played second base and third base at Triple-A Worcester as well this season.

Ranked No. 6 in Kiley McDaniels’ recently updated top 50 prospect rankings, Mayer hit .265/.342/.465 over 43 games and 193 plate appearances at Triple-A, with 9 home runs, 43 RBI and 2 stolen bases. The No. 4 pick in the 2021 amateur draft, Mayer hits left-handed, makes solid contact and drew a 10.4% walk rate this season. There is power upside, but as with most prospects, fantasy managers should keep initial expectations well in check.

Everyone loves the prospects until they reach the majors and alter their narrative (as most do). Chicago Cubs rookie IF Matt Shaw struggled earlier this season and was sent back to Triple-A, though he has returned to the majors. Arizona Diamondbacks SS Jordan Lawlar remains hitless in the majors this season. New Red Sox teammate Kristian Campbell is hitting .225 with a 27% strikeout rate. Hitting big league pitching can be problematic even for long-time veterans. In ESPN’s shallow standard leagues, with no middle infield spot and only nine active hitting spots, it is tough to make an argument to rush out and add Mayer. At the time of the promotion announcement, he was available in 94% of ESPN standard leagues.

Those needing to replace Bregman at third base should look at the Texas Rangers‘ Josh Jung and Jake Burger, and the Philadelphia Phillies‘ Alec Bohm, proven players with job security. For those looking at adding Mayer as their shortstop, Angels star Zach Neto somehow remains available in 71% of leagues, and he certainly comes recommended over Mayer, as does Colorado Rockies starter Ezequiel Tovar. Mayer will likely hit near the bottom of the Boston lineup. If he hits well, he might move up, and he might keep his roster spot even when Bregman returns to health.

It is exciting when one of the top prospects in the sport earns a promotion, but hitting a baseball against top pitching can be challenging for all. Those in deeper formats can make a better case to add Mayer and hope for the best.