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Sean Sullivan makes MLB debut for Rockies against Athletics in Las Vegas

Yahoo Sports • 1 min read • Latest: Jun 13, 2026, 1:05 AM

Last updated Jun 13, 2026

Sean Sullivan makes MLB debut for Rockies against Athletics in Las Vegas

Summary

The Colorado Rockies face the Oakland Athletics at Las Vegas as rookie pitcher Sean Sullivan makes his big-league debut. Sullivan, with a 5.60 ERA in Triple-A this season, aims to improve a Rockies squad that enters the game at 26-43. The Athletics, at 33-35, look to continue their momentum after winning two of three against the Brewers. Both teams are on the road, with the Athletics temporarily away from their home in Sacramento. The starting pitchers are both rookies, with Oakland's Gage Jump also looking to maintain a solid performance following two strong outings.

Source Links

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Key Details

•Rockies are on a six-game road trip, starting with the Athletics.
•Sullivan has 50 strikeouts but questions linger about his strikeout rate.
•Athletics lead the AL West by only two games despite their overall record.
•Jump has a 2.45 ERA with modest strikeout numbers in his brief MLB career.

Latest Updates

1:05 AMYahoo Sports — Colorado Rockies vs. Athletics game thread: Sean Sullivan vs. Gage Jump

What they're saying

"
Sean Sullivan takes the mound for the Rockies — making his big-league debut — as fellow rookie lefty Gage Jump looks to keep things rolling for the A’s in Vegas.
— Yahoo Sports

Related Teams & Leagues

Arizona Diamondbacks Colorado Rockies Milwaukee Brewers Oakland Athletics MLB Baseball