Miami Marlins middle infielder Otto Lopez (finger) is starting at shortstop and batting leadoff for the Fish on Tuesday against the hosting Houston Astros and right-hander Tatsuya Ima at Daikin Park, per MLB.com. Lopez suffered a finger injury when he was hit by a groundball on Saturday, causing him to miss the team's last two games. The 27-year-old Dominican should be returned to all starting lineups in traditional fantasy formats on Tuesday now that he's back. Lopez was a first-time All-Star in 2026 in his fifth year in the big leagues, and he currently leads the league in batting average (.335), hits (130), and doubles (27) while also sporting a .368 on-base percentage, .505 slugging percentage, .873 OPS, nine home runs, 46 RBI, 18 stolen bases, and 61 runs scored in 97 games across 419 plate appearances. He's been even better so far in July, going 19-for-55 (.345) with two homers, five doubles, two triples, nine RBI, eight runs scored, and two stolen bases in only 13 games played. Lopez has never faced Imai in his MLB career.

Updating a previous report, Chicago White Sox infielder Colson Montgomery (shin) has been scratched from Tuesday's starting lineup against the hosting Texas Rangers at Globe Life Field due to a shin contusion that he suffered in Monday's series opener, according to the team. Luisangel Acuna is now starting at the 6 and will bat eighth against Rangers right-hander Kumar Rocker. Montgomery will take another day to heal after fouling a ball off his right shin on Monday. The 24-year-old left-handed slugger should be considered day-to-day for now with a good shot at returning for Wednesday's contest in Texas. The former 22nd overall pick in 2021 is striking out 32.4% of the time, which is why he's hitting only .222 (79-for-356) in his first full major-league season, but his power plays in all fantasy baseball formats. After clubbing 21 round-trippers as a rookie in 71 games, Montgomery has 24 homers and 57 RBI in 398 plate appearances in 2026. Get him back into your starting lineups on Wednesday if he is cleared to return for the Pale Hose.

Chicago White Sox infielder Colson Montgomery (shin) is starting at shortstop and will hit cleanup for the White Sox in Tuesday's game against the hosting Texas Rangers and right-hander Kumar Rocker at Globe Life Field, per MLB.com. Montgomery will return on Tuesday for the second game of the series after being pulled in Monday's series opener after he fouled a ball off his right shin. After hitting 21 homers in 71 games as a rookie for the Pale Hose in 2025, Montgomery has hit 24 homers and driven in 57 runs in 95 games in 2026, although he's also hitting just .222/.304/.472 in 398 plate appearances. The 24-year-old left-handed hitter should be returned to all starting lineups for his power stroke. In 14 games so far in July, Montgomery has gone 13-for-57 (.228) with three homers, two doubles, eight RBI, and eight runs scored in 60 plate appearances. The former first-rounder is hitting just .207 (51-for-246) against righties this year, but 16 of his 24 long balls have come against them. Montgomery has never faced Rocker in his young MLB career.

Houston Astros first baseman Christian Walker (hip) is starting at first base and is batting sixth for the Astros on Tuesday against the visiting Miami Marlins and right-hander Tyler Phillips, according to MLB.com. Walker is back in the starting nine after missing the last two games due to a right-hip injury that he suffered on a swing on Saturday. The 35-year-old veteran will look to get back on track at the plate against a pitcher he has never faced after going 7-for-41 (.171) with one homer, three doubles, two RBI, five runs scored, three walks, and 15 strikeouts in 13 games and 48 plate appearances so far in July. Walker already has 20 home runs in 365 at-bats in 2026, but he's slashing just .233/.310/.455 with a .764 OPS, with 58 RBI and 50 runs scored in 99 games played. He's not striking out a ton (23.1% of the time), but his 43% ground-ball rate is his highest since 2020 with the Arizona Diamondbacks. Fantasy managers looking to buy low on Walker's power should think twice when looking at his .223 expected batting average and .301 xwOBA.