
Thursday's Opening Day held extra special meaning for a select few MLB pros.
It marked the first major league appearances for several rookies, many of whom had big debuts.
Which rookies stole the show on the first full day of MLB action? Below, we take a closer look at five, starting with the good and ending with the best.
Selected in the Rule 5 Draft last December, Baumler has already had a week to remember. On Monday, Rangers manager Skip Schumaker surprised Baumler with a mound visit during his final spring training appearance to inform the 2025 fifth-round draft pick he made the Opening Day roster.
"I wasn't expecting it," Baumler told Rangers Sports Network. "I was like, why is he coming out here?
"I thought I was ... getting taken out of the game," he laughed.
Moment of a lifetime for Carter Baumler
— Rangers Sports Network (@RangersSNtv) March 24, 2026
He joined @LauraStickells after finding out he made the Opening Day roster. pic.twitter.com/FAjrrTBvyt
It didn't take long for Schumaker to use Baumler, who pitched the eighth inning of a 5-3 road loss at the Philadelphia Phillies.
His debut was a mixed bag, but Baumler managed to escape a jam of his own making. He began by walking Phillies third baseman Alec Bohm on five pitches before recording two outs, including his first career strikeout when he caught right fielder Adolis Garcia looking.
Carter Baumler... you have your first big league strikeout! pic.twitter.com/QItLCO7THe
— Rangers Sports Network (@RangersSNtv) March 26, 2026
Baumler loaded the bases with a double and hit by pitch but closed the inning without allowing a run by getting fellow rookie Justin Crawford (more on him soon) to pop out.
Per Baseball Savant, Baumler's fastball maxed out at 96 mph, and he also showed nice movement with his curve, making there more to like than dislike about his debut.
That didn't take long.
Crawford swung at the first pitch he saw from Rangers starting pitcher Nathan Eovaldi, and he fired the 94 mph four-seam fastball back up the middle for a line-drive base hit.
First pitch, first MLB hit
— MLB (@MLB) March 26, 2026
Welcome to the league, Justin Crawford! pic.twitter.com/X7FolxDbnh
He added a lead-off single in the bottom of the fifth inning, later scoring on Bohm's three-run home run.
THERE'S NO PLACE LIKE BOHM! pic.twitter.com/Yx7NF9WjIl
— Philadelphia Phillies (@Phillies) March 26, 2026
Crawford finished 2-for-4, providing an important punch from the No. 9 spot in the lineup. Much like his father, 15-year MLB outfielder Carl Crawford, Justin has fantastic speed, stealing 145 bases in 325 career minor league games, which could give him a chance to move up in the order.
The No. 7 overall pick of the 2024 MLB Draft, Wetherholt ranks as the fifth-best prospect in MLB. He showed why with a strong first impression in the Cardinals' 9-7 comeback victory in their home opener over the Tampa Bay Rays.
Wetherholt led off the bottom of the third with a monster home run, blasting Rays starter Drew Rasmussen's 94 mph four-seamer 425 feet to centerfield. Per Baseball Savant, it would have left the yard in 29 of 30 MLB ballparks, with the Arizona Diamondbacks' Chase Field being the lone exception.
JJ WETHERHOLT
— MLB (@MLB) March 26, 2026
He leaves the yard in his Major League debut! pic.twitter.com/4NNDZYirt6
Wetherholt, who added some strong plays as a fielder, finished 1-for-4 with two runs batted in (RBI), also adding a sacrifice fly as part of an eight-run sixth inning that erased a 7-1 deficit.
The Mets had a stunning offensive explosion against the Pittsburgh Pirates and reigning NL Cy Young Award recipient Paul Skenes, who was pulled after allowing five runs in 0.2 innings.
While not part of that outburst (Benge struck out swinging in his lone at-bat against Skenes), he contributed later, hitting a solo home run in the bottom of the sixth to extend New York's lead to 10-5.
Carson Benge's first career HR comes on #OpeningDay! pic.twitter.com/kJZCKOh2xt
— MLB (@MLB) March 26, 2026
Benge, selected No. 19 overall in 2024, also walked twice and added a stolen base in the 11-7 win, making up for strikeouts in his first two at-bats. Per MLB analyst Sarah Langs, he became the 14th player since the implementation of the modern steal rule (1898) to hit a home run and steal a base in his MLB debut and only the second Met, joining Lenny Dykstra, who accomplished the feat on May 3, 1985.
Carson Benge is the 14th player with a homer and SB in his MLB debut since the modern SB rule was adopted (1898) 2nd Met: 5/3/85 Lenny Dykstra 1st MLB player to do so since 8/9/23 Weston Wilson
— Sarah Langs (@slangsonsports.bsky.social) 2026-03-26T20:26:03.171Z
Forget an MLB debut. A 10-year veteran would love to have McGonigle's Opening Day.
MLB's No. 2-ranked prospect had a massive performance in an 8-2 road win over the San Diego Padres, recording a third of the Tigers' hits by going 4-for-5 at the plate. He was also 1-for-1 with runners in scoring position, driving in two runners on a bases-loaded double in the top of the first.
Welcome to the bigs, Kevin McGonigle!
— MLB (@MLB) March 26, 2026
He drives the very first pitch he sees for a 2-run double and his first MLB hit pic.twitter.com/U2RMcKlXgZ
He added a second double in the top of the third, scoring two batters later, then singles in two of his last three at-bats.
Two MLB at-bats
— MLB (@MLB) March 26, 2026
Two doubles
Kevin McGonigle is having himself a Major League debut #OpeningDay pic.twitter.com/BWfYiH6jlk
Per MLB's official social media account, McGonigle is the sixth player since 1900 to have four hits in his MLB debut.
Kevin McGonigle is just the 6th player since 1900 to tally 4 hits in his MLB debut on #OpeningDay! pic.twitter.com/sB5MvfSqYA
— MLB (@MLB) March 26, 2026
"I did what I had to do to help this team win today," McGonigle told Detroit SportsNet following the game. "I'm looking forward to doing that all season."
.@daniellabruce_ caught up with Kevin McGonigle after his historic MLB debut!
— Detroit Tigers (@tigers) March 26, 2026
Subscribe to Detroit SportsNet: https://t.co/8Pjp0NCB1D pic.twitter.com/rJCNRSqvlk
If Thursday was indeed a glimpse of his future, the Tigers are in store for a bright 2026.
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