The Seattle Mariners have placed right-handed pitcher Trent Thornton (illness) on the 15-day injured list with appendicitis. In a corresponding move, the Mariners promoted right-handed pitcher Troy Taylor from Triple-A Tacoma. Through his first 15 1/3 innings of work this season, Thornton has held a 5.87 ERA with a 1.30 WHIP. Across this stint, Thornton has struck out 11 batters and served up four walks. He has allowed five long balls. Under the hood, Thornton generated a 6.71 xERA and a .313 xBA, which are both in the fifth percentile among qualified pitchers. Fantasy managers should expect Taylor to have a role as a low-leverage option in the bullpen. Through the opening month of the season, Taylor has tossed three innings of work in the majors but has allowed four runs.

The Tampa Bay Rays transferred infielder Ha-Seong Kim (shoulder) from the 10-day injured list to the 60-day injured list on Friday, which pushes his potential return to late May at the earliest. The Rays also called up right-hander Connor Seabold from the minors and optioned right-hander Mason Englert to Triple-A Durham. Kim has yet to make his debut with the Rays while recovering from offseason surgery on his shoulder. The 29-year-old middle infielder increased his baseball activities late last month and could be ready for a minor-league rehab assignment soon. If he's able to avoid any setbacks with his shoulder once he begins playing in games, he could be on track to make his season debut in Tampa in late May or early June. When fully healthy, Kim will mainly offer modest speed for fantasy managers in deep-mixed leagues as the Rays' primary shortstop.

St. Louis Cardinals third baseman Nolan Arenado (back) is starting at third base and is hitting cleanup for the Cards in Friday's series opener against the hosting Washington Nationals and left-hander Mitchell Parker. Arenado was scratched from the series finale on Wednesday but has returned after a scheduled off day on Thursday due to travel. The 34-year-old veteran hasn't been special at all at the plate so far in 2025, hitting .256 (33-for-129) with three home runs, 14 RBI, 16 runs scored and one stolen base. He enters Friday's contest with a four-game hitting streak in which he's gone 6-for-15 with an RBI and three runs scored. Arenado will be looking for his first career hit against Parker, as he's hitless in just three at-bats against him. Although he doesn't have a homer against a lefty this year, Arenado has gone 10-for-30 against southpaws.

St. Louis Cardinals catcher Ivan Herrera (knee) was officially activated off the 10-day injured list prior to their contest on Friday against the Washington Nationals. Herrera has been on the injured list since early April with a knee bruise. This evening, Herrera will bat sixth and serve as the designated hitter. While he has been sidelined, the Cardinals have given most of the catching duties to Pedro Pages and Yohel Pozo. Herrera was enjoying an impressive start to the campaign as he posted a .381/.458/.1.048 slash line with four long balls across his first seven contests. Last summer, the 24-year-old appeared in a career-high 72 games and held a solid .301/.372/.428 slash line. Fantasy managers should expect the 24-year-old to operate as the clear No. 1 backstop for the foreseeable future. Given his offensive upside, he is worth a look in one-catcher leagues and a must-start option in two-catcher formats.

Detroit Tigers right-handed pitcher Alex Cobb (hip) looked uncomfortable when covering first base on a groundball, according to Chris McCosky. Cobb is working his way back from hip surgery and appeared to be in pain during his most recent bullpen session. McCosky noted that the 37-year-old looked fine on the mound but not so much when moving to first base. The veteran has been sidelined since February. He is currently on the 15-day injured list, but given his slow progress, the Tigers will likely opt to shift him to the 60-day injured list. Fantasy managers should keep an eye on his status as he slowly continues to increase his workload. Last summer, Cobb was limited by injuries as well, tossing just 16 1/3 innings of work. When he does return, he could hold value in deeper 15+ team formats as a back-end option in the starting rotation.