Minnesota Twins outfielder Alex Kirilloff is not in Saturday's lineup as the Twins are slated to face Boston southpaw Brennan Bernardino. Kirilloff has yet to make a start this season against a left-handed pitcher, and Saturday will be no different. As a result, Willi Castro will play left field, which opens the hot corner for Jose Miranda. Kirilloff has put up a solid .247/.310/.449 slash line with three home runs this season. The 26-year-old should be expected to return to the Twins lineup on Sunday, as they are scheduled to face right-hander Cooper Criswell. Both Castro and Miranda are sneaky plays in DFS on Saturday, as they are batting in the two- and three-holes, respectively, and should see plenty of RBI and scoring opportunities.

Chicago Cubs infielder Miles Mastrobuoni was called up from Triple-A Iowa on Saturday in a corresponding move that sent Cubs first base prospect Matt Mervis back down to the minor leagues. Mervis disappointed fantasy managers in his second major league stint and will most likely not receive another chance until later in the summer. Mervis posted a .115/.148/.154 line in nine games with the Cubs this season, which is not too different from his .167/.242/.289 line he had across 27 games last year. Mastrobuoni played in 61 games last season with the Cubs and put up a modest .241/.308/.301 stat line. The 28-year-old should be expected to reclaim his utility role once again this season after starting games at second base, third base, and in the outfield last season. He is nothing more than a desperation play in DFS when he is in the Cubs lineup.

Milwaukee Brewers outfielder Joey Wiemer (knee) was placed on the 10-day injured list on Saturday with left knee discomfort. Infielder Andruw Monasterio was recalled from Triple-A in a corresponding move. Wiemer was removed from Friday's game after injuring his knee when attempting to catch a ball in left field. Wiemer struggled in his first major league season last year with a .204/.283/.362 line. He hit 13 home runs and swiped 11 bags. The 25-year-old carried his struggles into the early part of this season with a disappointing .174/.208/.174 line with no home runs and just one stolen base. The Brewers will have a revolving door in left field for the time being, splitting between Sal Frelick, Jackson Chouiro, and Jake Bauers. Rookie Jackson Chourio was given the nod to man left field in Saturday's game against the Chicago Cubs and will face Jameson Taillon, who is entering the game with a stellar 1.50 ERA.

St. Louis Cardinals right-handed reliever Keynan Middleton (forearm) threw a bullpen session off a mound on Saturday for a second straight day. He said he'll throw twice more in St. Louis next week and then head to Double-A Springfield for a minor-league rehab assignment. Middleton has been pain-free since receiving a platelet-rich plasma injection in his right arm on April 6, and it looks like the 30-year-old is getting close to making his season debut out of the Red Birds' bullpen. He had a 3.38 ERA (4.20 FIP), a 1.24 WHIP, two saves, 23 walks and a career-high 64 strikeouts in 50 2/3 relief innings last year with the Chicago White Sox and New York Yankees and figures to hold a late-inning setup role for the Cardinals when he's healthy, making him an option for those in holds leagues.

St. Louis Cardinals outfielder Dylan Carlson (shoulder), who is close to a return from his sprained left shoulder, is in the team's clubhouse on Saturday before their game against the visiting Chicago White Sox. It means that Carlson is likely on the verge of officially being activated from the injured list, although he's not in the team's lineup. The 25-year-old played nine innings in the field for Triple-A Memphis on Friday and went 3-for-11 with a solo home run in four rehab games with Memphis. With Tommy Edman (wrist) still on the IL, Carlson is expected to take over center field duties from rookie Michael Siani when he's officially active on the Cardinals' roster. The former first-round switch-hitter so far hasn't lived up to expectations in his four years in the big leagues, but he's certainly worth a waiver-wire pickup in deep-mixed leagues.