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The Arizona Diamondbacks activated slugger Christian Walker from the 10-day injured list but also will be without outfielder Lourdes Gurriel Jr. due to a calf injury when they face the host San Francisco Giants on Tuesday night.

Umpire Nick Mahrley will miss a second week after after sustaining a concussion during an Aug. 25 game at Yankee Stadium.

With less than a month left to play in the regular season, here's what our experts predict will happen the rest of the way.

Texas came into the season with high hopes of going back-to-back. Instead, the Rangers enter the final month with little left to play for. Here's where it all went wrong.

Cubs starter Justin Steele missed Tuesday's game with elbow soreness, and it is unclear how much time the lefty will miss.

New York Yankees ace Gerrit Cole exited his start at Texas with a right calf cramp after throwing his warmup pitches in the seventh inning Monday night.

The White Sox had their latest skid extended to 11 games with a 13-3 rout at the hands of the Orioles on Monday, the 20th straight loss in which Chris Flexen started to set a big league mark for most consecutive losses in a pitcher's starts.

Veteran starter Jacob deGrom likely will make his fourth rehab start Saturday in his comeback from elbow surgery, though the two-time Cy Young Award winner said his return to the Texas Rangers after more than 16 months could be an option that night.

Kodai Senga hopes to pitch again for the New York Mets this season -- perhaps even as a reliever -- if they are still in the playoff race when he's eligible to return from the 60-day injured list on Sept. 25.

Milwaukee Brewers shortstop Willy Adames extended his home run streak to five games to tie a team record with a three-run shot vs. the Cardinals.

Padres right fielder Fernando Tatis, who hasn't played since June 21 due to a stress reaction in his right thighbone, was activated off the 60-day injured list.

The Minnesota Twins sent veteran outfielder Byron Buxton on a rehab assignment to Triple-A St. Paul on Monday.

The Reds designated first baseman Dominic Smith for assignment Monday and recalled outfielder Blake Dunn from Triple-A Louisville.

The Astros placed outfielder Jake Meyers on the paternity list Monday and recalled Chas McCormick from Triple-A Sugar Land.

Kansas City Royals manager Matt Quatraro will not be with the club for Monday's home game against the Cleveland Guardians to tend "to a personal matter."

White Sox pitcher Drew Thorpe, who was 3-3 over nine starts since making his MLB debut, will have surgery for a bone spur in his pitching elbow.

We have everything you need to know, from current playoff matchups to league races to the postseason schedule.

Caden Dana, at 20 years, 259 days, became the youngest pitcher in Angels history to win his major league debut as L.A. rallied over the Mariners.

The Minnesota Twins placed outfielder Manuel Margot on the 10-day injured list on Sunday because of a right groin strain sustained the previous night.

The MLB-worst Chicago White Sox lost to the New York Mets, 2-0, on Sunday, their franchise-record 107th defeat of the season, which broke the club mark set by the 1970 team, an effort that also completed the first 0-10 homestand in franchise history.