The Colorado Rockies are opening a six-game road trip tonight with three games against the Athletics in Las Vegas, where the A’s are playing a rare ‘home’ series away from their temporary home in Sacramento. After this series, the Rockies head to Wrigley Field for three against the Chicago Cubs.
The nomadic Athletics enter at 33-35, and only two games out of first place in a middling AL West. They are 5-4 to start June and are coming off taking two of three from the same Milwaukee Brewers team that swept the Rockies last week.
The A’s are not a complete team, but they can hit.
They rank seventh in baseball with a .735team OPS, led by Nick Kurtz (162 OPS+) and Shea Langeliers (135 OPS+). The pitching and defense have lagged behind, with Oakland ranking 27th in starter ERA, 21st in relief ERA, and 25th in Defensive Runs Saved.
Colorado enters the Vegas series at 26-43, but the Rockies are 4-5 through nine June games after taking two of three from the Cubs. That was a needed bounce-back after the Brewers series.
There has also been recent prospect intrigue. Cole Carrigg, the Rockies’ No. 4 PuRP, was called up and clubbed his first big-league homer, and now left-hander Sean Sullivan (No. 8 PuRP) has been promoted to make his MLB debut tonight.
Sullivan, 23, has made 11 starts for Triple-A Albuquerque this season, posting a 5.60 ERA over 54.2 innings with 50 strikeouts, 19 walks.
Sullivan is not a power lefty. He works from a funky delivery and leans on a broad pitch mix: a four-seam fastball (40.1%), sweeper (25.6%), cutter (17.2%), changeup (14.3%), and occasional slider (2.7%). The fastball generally lives around 88-90 mph, with the cutter in the 85-87 mph range, the changeup around 78-80 mph, and the sweeper closer to 76-78 mph.
Sullivan has not missed bats at the same rate he did earlier in his minor-league career, and hitters have made frequent contact against him, especially in the zone. The contact has not been especially loud, though. His hard-hit rate is 30.1%, and his xERA is 4.81, which is more forgiving than the traditional ERA suggests.
He has limited hard contact and kept the walk rate manageable, but the lower strikeout rate and 10 home runs in 11 starts leave real questions about how thin the margin is. Tonight gives the Rockies a first look at how the pitch mix, deception, and contact-management traits translate against big-league hitters.
The Athletics will counter with another rookie left-hander in Gage Jump. Jump came into the year ranked as the No. 38 prospect in baseball by MLB Pipeline and the No. 3 prospect in the Athletics system. The 23-year-old southpaw is making just the fourth start of his major-league career.
Jump enters at 2-1 with a 2.45 ERA, 1.09 WHIP, 13 strikeouts, and five walks across 18.1 innings. After allowing four runs in his MLB debut, he has settled in quickly. He held the Cubs to one run on three hits over seven innings on June 2, then shut out the Astros over 6.1 innings on June 7, allowing just three hits while walking three. Across those two starts, he has allowed one run on six hits over 13.1 innings, though the strikeout total has been modest at five.
Jump brings more traditional left-handed power stuff than Sullivan. He has leaned on a four-seam fastball (49%) at 96.4 mph, while mixing in a slider (24%) at 87.7 mph, a changeup (10%) at 88.2 mph, a sweeper (9%) at 84.5 mph, and a curveball (9%) at 82.3 mph.
Jump’s xERA sits at 3.47, and hitters have not made a ton of loud contact against him, with a 30.2% hard-hit rate. His strikeout rate is only 17.8% in the majors with a 21.3% whiff rate, so the swing-and-miss has not fully carried over yet. That said, he struck out 56 batters in 38 Triple-A innings this season.
Sterlin Thompson and Carrigg both faced Jump earlier this season in Las Vegas on May 20th. Thompson went 1-for-3 with a single and a strikeout, while Carrigg went 0-for-2 with a strikeout and a flyout. Albuquerque eventually scored six runs in the ninth inning to stun Las Vegas, 6-5.
Gage could create a tough matchup for a Rockies lineup that has had trouble with left-handed pitching. As a team, Colorado is hitting .239 with a .644 OPS against lefties this season. Jump has the velocity, five-pitch mix, and prospect pedigree to make this difficult if the Rockies let him settle in.
So, can Sullivan give the Rockies a useful debut, can the offense do enough against another talented rookie lefty, and can the Rockies pull out a late-night win in Las Vegas?
Now for the details…
First Pitch: 8:05 p.m. MDT
TV: Rockies.TV
Radio: KOA 850 AM/94.1 FM; KNRV 1150
Athletics SB Nation Site:Athletics Nation
Lineups:
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