Nurse!

The Cincinnati Reds will be without rookie Tyler Callihan for a few months -- the left fielder underwent surgery to repair the gruesome arm fracture he suffered while trying to make a play earlier this week.

Callihan -- who signed a $1.5 million deal with Cincy -- had the procedure done on his forearm on Tuesday, just one day after he attempted to catch Matt Olson's fly ball during a tilt against the Atlanta Braves at Truist Park.

The moment was captured on the broadcast ... showing Callihan, 24, crashing into the wall and falling to the ground, holding his fractured arm.

Tough break for Reds rookie Tyler Callihan ... he snapped his arm while trying to make a diving catch Monday night -- and video of the play is tough to watch.

The gruesome scene unfolded in the third inning of Cincinnati's matchup with the Braves at Truist Park in Atlanta ... when Matt Olson blasted a deep fly ball to left field.

Callihan sprinted from his position to try to track it down ... and while he was initially able to secure it -- it popped free after he fractured his arm running into a nearby wall.

Lil Uzi’s back in the mix, making his big Instagram comeback after a medical emergency last month that had him laid up in the hospital.

The rapper was back to doing his thing, dropping a bunch of short clips Monday  -- skateboarding around what looked like his recording studio.

Looks like Uzi’s back to full energy -- he even used his caption to thank fans for all the love, and kept things optimistic, saying he knows this summer’s gonna be a good one for him.

"Floribama Shore" star Kirk Medas is in a hospital bed in the intensive care unit and he needs a machine to breathe.

Nilsa Prowant, who starred alongside Kirk on the canceled MTV show, just shared a health update on her good friend Kirk ... and it doesn't sound good.

Kirk's in the ICU fighting necrotizing pancreatitis, Nilsa says ... and he's been there for nearly two weeks and is now sedated and using a ventilator to breathe.

The fan who tragically fell from an outfield wall at PNC Park on Wednesday has been identified as Kavan Markwood -- a 20-year-old former college football player.

A spokesperson for the South Allegheny School District -- where Markwood played his high school football -- confirmed to TribLive on Thursday it's Markwood who's currently fighting for his life at a Pittsburgh-area hospital after he tumbled to the warning track during the Pirates vs. Cubs game.

"Everyone at South Allegheny would say he is a hard-working, highly resilient young man," the district rep, Laura Thomson, said. "He’s a fighter. He's going to need that resiliency now."

Gilbert Arenas returned to work on Thursday ... fresh off the great news his basketball star son, Alijah, would complete his recovery from home following his serious Cybertruck crash.

The former Wizards guard resumed his spot on the "Gil's Arena" set alongside Josiah Johnson, Brandon Jennings and Nick Young ... and they got right into it by discussing the Lakers' early exit from the playoffs at the hands of the Timberwolves.

Arenas was in great spirits despite what's been going on with his family ... as he arrived in a Homey D. Clown costume (from Damon Wayans' character in "In Living Color") to honor a promise he made on the series.

10:40 AM PT -- The Pirates acknowledged the incident prior to their game against the Cubs on Thursday morning ... taking a moment to offer prayers for the fan and recognize the medical personnel who helped rush him to the hospital.

6:21 AM PT -- Authorities in Pittsburgh say the fan is currently at a local Pittsburgh hospital in "critical condition."

No further updates regarding his health were given ... though they added they believe the incident was an accidental one.

An MLB fan sustained significant injuries in a fall from a PNC Park outfield wall on Wednesday night ... and the scene was so horrifying, Pirates manager Derek Shelton asked afterward for "everybody to keep him in their prayers."

Jeremy Renner is giving a shocking account of his near-fatal 2023 snowplow accident ... saying at one point, he briefly died.

The Marvel star spells it all out in his new memoir, "My Next Breath," detailing everything that came with getting mowed by a 14,000-pound snowplow.

In an excerpt from the book, according to UsWeekly, Renner describes the agony he faced after saving his young nephew from the machine, lying helpless after breaking over 30 bones.

Pastor T.D. Jakes suffering a heart attack during a November sermon was one of the dominoes that led to him taking on a reduced role at his megachurch.

Reps for Jakes tell TMZ ... the heart attack, emergency surgery and ensuing recovery are some of the reasons he's taking a step back from his role as pastor of The Potter's House of Dallas.

We're told Jakes spent a lot of time recovering from the heart issue, and it's affecting him to some degree.

Rapper Yung L.A. of "Ain't I" fame passed out while performing over the weekend -- and the only thing more scary was the fall he took afterward!!!

The weathered Atlanta rapper was live at the Elite Lounge in Greenwood, SC and appeared to be bursting with energy as the opening chords of his hit song "Futuristic Love" began to blare through the club. Yung L.A. then tried to pass the microphone to a woman standing onstage ... but he quickly nosedived to the floor, landing flat on his face.

Two men attempted to hold Yung L.A. before his body went limp and he sank to the floor. It didn't appear to be too serious ... both guys were cracking up laughing!!!

Pastor T.D. Jakes is stepping back from his duties in his megachurch ... announcing his successors months after a medical incident onstage ended with him on the operating table.

The pastor -- who served as the head of The Potter's House church since he founded it back in 1996 -- told the church Sunday that he would be handing over his duties to Sarah Jakes Roberts and Toure Roberts, his daughter and her husband.

Jakes released a long statement about his departure ... citing the need to address major economic issues of the time as part of the impetus for his decision -- claiming he wants to focus on "serving as a bridge between community, culture, and corporate alliances to help position our nation for a stronger future."

Tony Mojanovski, a groom from "Married at First Sight Australia," was rushed to the hospital after suffering a heart attack.

The reality TV star underwent emergency surgery after being rushed to a New South Wales hospital this week after experiencing severe chest pains.

The 53-year-old had multiple tests performed on him, including a coronary artery bypass graft, which treated the blockage and ultimately saved his life.

Lele Pons just wanted to find out the gender of her child ... and, nearly had to make an emergency room visit, too -- 'cause she fell pretty hard during the reveal.

The social media star and her singer-songwriter husband, Guaynaa, had their gender-reveal party Friday ... and, they decided to announce their baby's gender with a whole bunch of slippery slime.

Basically, they got a bunch of their family and friends to break up into two groups ... one underneath a "Boy" sign and another under a "Girl" sign -- with a fake dynamite trigger in the middle.

Alijah Arenas' Cybertruck ended up wrapped around a tree in an L.A. suburb early Thursday morning -- and the cause is still a mystery -- but investigators do NOT believe alcohol or drugs were a factor.

TMZ Sports spoke with our law enforcement sources ... and we're told LAPD didn't observe any signs of intoxication at the scene, just moments after the 18-year-old 5-star recruit was pulled from his burning vehicle around 4:55 AM.

After Arenas was transported to a local hospital, cops followed up ... but the soon-to-be USC basketball star was already intubated (tube down his throat), so no blood draw was done.

The serious car crash that sent 5-star hooper Alijah Arenas to the hospital with serious injuries was likely caused by excess speed, law enforcement sources tell TMZ Sports.

The Los Angeles Police Department was on the scene of the 5 AM crash, which occurred along a two-lane residential roadway in the Winnetka neighborhood of the San Fernando Valley, in a 40 MPH zone.

18-year-old Alijah was alone in the Cybertruck -- owned by his father, ex-NBA star Gilbert Arenas -- at the time of the accident ... which was a single-vehicle wreck.

A man in China has been watching way too many cartoons ... 'cause he took the short exit out of what looks like an argument -- throwing himself through a window in a wild clip.

The incident went down in the Yuhua District of Changsha City, Hunan Province early this month ... with cameras capturing a man and woman who look like they're having a heated discussion.

There's no audio, so we can't tell exactly what they're saying ... but, clearly this dude thinks better of continuing their tête-à-tête and hurls himself into the window.