Star shortstop Fernando Tatis Jr. of the San Diego Padres was placed on the 10-day injured list Saturday, a day after partially dislocating his left shoulder for the third time this season.

The Padres announced the move prior to their game against the Colorado Rockies. They also placed right-hander Chris Paddack on the IL with an oblique injury.

Tampa Bay Rays right-hander Tyler Glasnow is expected to undergo Tommy John surgery next week, sources told ESPN, after attempts to rehabilitate a partially torn ulnar collateral ligament in his elbow left him still in pain.

While there remains a possibility that Dr. Keith Meister, who will examine Glasnow next week, will recommend against the procedure, the likelihood is that the ace of the Rays' pitching staff will miss the remainder of the 2021 season -- and perhaps all of 2022 as well.

Star shortstop Fernando Tatis Jr. left Friday night's game in the first inning with a partially dislocated left shoulder and his San Diego Padres lost 9-4 to the Colorado Rockies, who were led by Ryan McMahon's grand slam and Jon Gray's solid outing.

It was the third time the 22-year-old Tatis left a game this year due to a left shoulder injury. He was the NL's starting shortstop in the All-Star Game.

The Milwaukee Brewers will be without Christian Yelich for at least 10 days after a positive COVID-19 test.

David Stearns says Yelich is experiencing "mild symptoms."

The positive test triggered contact-tracing protocols that delayed Milwaukee's flight to Pittsburgh, where the Brewers opened a series against the Pirates on Tuesday night. The team flew there on Tuesday morning instead of Monday night.

"A lot of it feels out of our control. This virus is so communicable that you are fearful it can affect a lot of people," Craig Counsell said. "I don't think we're completely out of the woods, but I think it's a good sign that we haven't had any other concerns with the virus spreading."

Stephen Strasburg will have season-ending neck surgery.

The Washington Nationals right-hander felt discomfort after a 27-pitch bullpen session last week and saw a specialist on Monday. Strasburg was diagnosed with neurogenic thoracic outlet syndrome and will be operated on by Dr. Greg Pearl in Dallas on Wednesday.

"He's down, he's frustrated," Dave Martinez said. "Hopefully after this procedure is done, it's the next hurdle, recovering and then starting to rehab as soon as he possibly can."

Strasburg has made just seven starts since he was named MVP of the 2019 World Series.

Mike Trout has had a setback in his return from a calf strain.

On July 19th, Trout said he was "really, really close" to beginning a rehab assignment.

One week later, that rehab assignment still hasn't begun because he still "feels something," Los Angeles Angels manager Joe Maddon said. "He just feels it a little bit in that area, when he really tries to move quickly."

Trout has played in just 36 games this season due to the injury.

The Los Angeles Dodgers placed All-Star right fielder Mookie Betts on the 10-day injured list Sunday with right hip inflammation.

In a corresponding move, the Dodgers activated right-hander Jimmy Nelson from the injured list after he recovered from a left lumbar strain.

Spencer Turnbull will undergo Tommy John surgery and miss the rest of the 2021 season and most or all of 2022, the Detroit Tigers have announced.

Turnbull was 4-2 with a 2.88 ERA in nine starts this season. He last pitched on June 4, then went on the injured list with a strained forearm.

He tossed a no-hitter on May 18 against the Seattle Mariners.

The New York Mets have placed Jacob deGrom on the 10-day injured list retroactive to July 15 with tightness in his right forearm.

The right-hander felt discomfort Friday while throwing a bullpen session, Luis Rojas said. An MRI hours later showed there was forearm tightness but no structural damage.

Rojas says that deGrom will not throw again until the discomfort goes away.

"I'm frustrated," deGrom said. "I don't know what else to say. I guess it's good news whenever structurally, everything looks good, but ... the level of frustration now is really high."

deGrom is 7-2 with a major-league-leading 1.08 ERA in 15 starts this season despite being hampered by multiple ailments.

New York Mets' right-hander Carlos Carrasco will begin a rehab assignment on Thursday.

The Mets lead the National League East but the bottom half of their starting rotation has been an issue.

Carrasco was acquired in the offseason blockbuster between the Mets and Cleveland Indians that sent Francisco Lindor to New York.