The Arizona Diamondbacks have made several roster changes due to injuries, placing infielder Pavin Smith on the 10-day injured list with a strained right oblique. Smith has been a solid contributor with a .261 batting average, eight homers, and 28 RBIs over 79 games. To fill his spot, the Diamondbacks recalled infielder Tristan English from Triple-A Reno. Additionally, the team placed right-hander Ryan Thompson on the 15-day injured list with a scapular strain, retroactive to Saturday, and also recalled right-hander Bryce Jarvis. Tommy Henry has been added to the 60-day injured list due to a right elbow injury.

Luke Weaver's impressive start as a reliable reliever for the New York Yankees has been overshadowed by recent struggles following a hamstring injury. With a worrying 13.50 ERA in his last seven outings, the Yankees are contemplating a trade for bullpen reinforcements. While names like Kyle Finnegan of the Washington Nationals and Shelby Miller from the Arizona Diamondbacks are in consideration, acquiring any quality relief arm will come at a steep price. The Yankees face tough choices as they strive to bolster their bullpen.

The upcoming MLB trade deadline promises to be a complex affair, with a majority of teams contending for playoff spots. The Arizona Diamondbacks hold a pivotal role, with several key players potentially on the trade block, including Eugenio Suárez and pitchers Merrill Kelly and Zac Gallen. Despite their recent struggles, the Diamondbacks' ownership may hesitate to dismantle a team that has worked hard to chase a playoff spot. The Miami Marlins' sweep over Arizona worsened their playoff odds, while injuries, particularly to Corbin Burnes, have left the pitching rotation in shambles. With July 31 approaching, all eyes will be on teams like the Detroit Tigers, Seattle Mariners, and St. Louis Cardinals looking to fortify their lineups.

Fantasy baseball managers often overlook potential sleeper pitchers in the current season. The focus shifts to Garrett Whitlock, Shelby Miller, and Chase Burns, each offering unique upside. Whitlock has been effective as an SP/RP for the Red Sox, boasting a 2.82 ERA and strong strikeout numbers, making him a valuable asset in leagues that incentivize holds. Miller has seen a resurgence in the relief role with a 2.03 ERA and job security as a closer for the Diamondbacks. The excitement builds around the Reds' prospect, Chase Burns, making his MLB debut, although his lack of experience and hittable fastball raises concerns.

As Week 12 of the 2025 fantasy baseball season unfolds, key players are rising or falling in performance, impacting their value in fantasy leagues. Evan Carter of the Texas Rangers has shown promise with a .283 batting average, powered by speed and newfound power since his call-up. In contrast, Corey Seager is struggling, battling performance issues and injuries, presenting a potential buy-low opportunity for fantasy managers.

Jeff McNeil from the New York Mets is trending upward with a solid .268 average and improved power metrics, while hitters like Brice Turang, who initially excelled, are now underperforming in stolen bases. On the pitching side, Shelby Miller has stepped up as a closer for the Arizona Diamondbacks, while David Peterson of the New York Mets is having a breakout season. However, Bailey Ober's inconsistencies raise concerns for fantasy owners.