Ryan Waldschmidt’s Walk-Off Homer Off Edwin Diaz Sinks Dodgers, Extends Diamondbacks’ Playoff Push

Ryan Waldschmidt turned Chase Field into chaos late Friday night, golfing a hanging Edwin Diaz slider 411 feet into the left-center field seats for a two-run, walk-off homer that lifted the Arizona Diamondbacks past the Los Angeles Dodgers, 4-3. It was just the second home run of the rookie outfielder’s career, but the first one that ended a game, and it sent LA to a season-high seventh straight loss while keeping Arizona’s playoff push very much alive.

The 23-year-old, drafted 31st overall by Arizona out of Kentucky in 2024, has been one of the sport’s quieter breakout stories all summer. He debuted on May 8 and has since climbed into every corner of the Diamondbacks’ lineup plans, batting .292 with two home runs, 15 RBI, six stolen bases and a .748 OPS across his first taste of the majors. Before the promotion, MLB Pipeline had him ranked as its No. 48 overall prospect in baseball, and he now sits as Arizona’s top-ranked prospect and inside the sport’s Top 100. Listed at 6-foot, 205 pounds and wearing No. 15 for the Diamondbacks, the right-handed hitter has split his time between center and left field while forcing his way into an everyday role on a team fighting for its playoff life.

How the Walk-Off Unfolded

Arizona trailed 3-2 entering the ninth after Andy Pages’ go-ahead homer in the eighth threatened to spoil the night. Dodgers manager Dave Roberts turned to closer Edwin Diaz, a three-time All-Star, to close it out. Diaz walked Max Kepler to open the frame, and pinch-runner Jorge Barrosa promptly stole second. After Tim Tawa struck out for the second out, Waldschmidt stepped in and turned a 2-2 slider into the biggest swing of his young career, sending the crowd at Chase Field into a frenzy as the ball cleared the wall in left-center. It was a rough continuation of a difficult season for Diaz, who has now allowed 11 earned runs across 11 outings and carries an 11.00 ERA. “It’s the slider,” Diaz admitted afterward. “The fastball was great today, but I missed the slider right in the middle. I think I was trying to be perfect with the pitch, and I’m missing right in the middle — I’ve got to be better. I’m a big league pitcher so I’ve got to make pitches.”

The homer capped a scorching stretch for Waldschmidt, who has hit .391 with a .522 slugging mark over his last seven games and .388 over his last 15. He’s shown the same patient, disciplined approach that made him one of the toughest outs in the minors, chasing far fewer pitches outside the zone than the typical Triple-A hitter before his call-up. In 2025, his first full professional season, he hit .289 with 18 home runs and 29 stolen bases across High-A and Double-A, walking 96 times, the second-most of any minor leaguer in baseball that year. He carried that momentum into 2026, hitting .289 with three home runs and six steals in 34 games at Triple-A Reno before Arizona summoned him to the majors, and he’s barely slowed down since.

Friday’s finish was also the type of moment bettors circle in real time, with sportsbooks moving live win probabilities on nearly every pitch of that ninth-inning at-bat. Anyone tracking the market shifts around a game like this can find real-time lines and matchup pricing through a look at the latest BetMGM review before placing a bet on the next Diamondbacks series.

What It Means for Arizona’s Playoff Push

The win kept the Diamondbacks holding down the final National League Wild Card spot, with Arizona sitting at 62-55 and locked in a tight race with Philadelphia and San Diego for the last postseason ticket. The D-backs have been one of the hottest teams in the league since the All-Star break, and moments like Waldschmidt’s walk-off are exactly the kind of spark a roster needs down the stretch. Fans tracking the race can check the latest MLB odds as Arizona tries to hold off the chasing pack in September.

For a franchise that landed Waldschmidt with a Prospect Promotion Incentive pick earned from Corbin Carroll’s Rookie of the Year season, Friday night was a full-circle moment. The early returns suggest Arizona may have found its next homegrown difference-maker at exactly the right time, with the Diamondbacks now looking to carry the momentum from a signature win into a crucial final stretch of the regular season.