MLB Home Run Predictions Today: Best HR Prop Bets, Picks, Parlay & Odds for Thursday, May 21

Josh Inglis - Betting Analyst at Covers.com
Josh Inglis • Betting Analyst 13+ years betting experience
Updated: May 21, 2026 , 01:58 PM ET • 4 min read

Shea Langeliers has already found success against José Soriano, who’s been inconsistent lately, and if that trend continues, the A’s catcher could do damage again — this time against an Angels bullpen that’s been far from steady.

Shea Langeliers A's MLB
Photo By - Reuters Connect. Athletics catcher Shea Langeliers (23) rounds the bases after hitting a solo home run against the St. Louis Cardinals

It’s a small MLB slate on Thursday, and things have been ice-cold lately—so it might be time for a little extra help to get these home runs and MLB player props back on track. I don’t usually go searching for it, but today feels like one of those days, and one matchup is drawing plenty of attention.

Along with a look at the Rockies-Diamondbacks game, I’m also eyeing slugging catcher Shea Langeliers to launch his 13th homer of the season when he faces José Soriano and a shaky Los Angeles Angels bullpen.

These are my favorite MLB home run predictions for Thursday, May 21. 

  • UPDATE: Added another HR pick + parlay.

Best MLB home run props today

Player to hit a HR Odds
Rockies Hunter Goodman +447
Diamondbacks Corbin Carroll +445
Athletics Shea Langeliers +350
💲Today's HR parlay +10600
Enjoying Covers content? Add us as a preferred source on your Google account Add as a preferred source on Google

Home run pick: Hunter Goodman (+447)

Hunter Goodman is just 1-for-13 in his career against Arizona Diamondbacks lefty Eduardo Rodríguez, but at this price, there is still plenty of home-run upside today.

First, it’s a small slate, but Goodman just saw E-Rod in his last start and did rope a 101-mph single off him. The Colorado Rockies also put nine balls in play at 95+ mph against the lefty in that series. Goodman posted a .969 OPS during it as well, including a homer off Merrill Kelly. The right-handed bat also owns the fastest swing on the team over the last two weeks at 75 mph.

The familiarity factor usually isn’t priced in, which gives this HR prop more expected value with a fair price around +380. The lefty starter has also pitched above both his career fly-ball and HR/FB rates, so some long-ball regression could finally be on the way.

With colder weather rolling in and pitcher-friendly winds showing up around the league, a controlled hitting environment may be the best place to hunt dingers on a small-slate Thursday.

  • Time: 9:40 p.m. ET
  • Where to watch: DBACKS.TV, Rockies.TV

Home run pick: Corbin Carroll (+445)

The Diamondbacks have a great hitting matchup today as the Rockies are rolling with call-up Zach Agnos, who hasn’t started a game this year and will hand things off early to a Colorado bullpen that owns the second-worst ERA over the last two weeks and ranks 28th in HR/FB rate over that stretch.

Corbin Carroll got the day off yesterday, but before that, he had ripped triples in back-to-back games and, three games ago, launched a pair of home runs against the Rockies and this bullpen.

It’s also nice to get a Top-10 bat sitting right at +EV with a fair price around +360. Over the last two weeks, Carroll ranks eighth in BlastContact, third in slugging, and second in ISO. On this small slate, he projects as the third-most likely player to go deep behind only Aaron Judge and Mike Trout.

  • Time: 9:40 p.m. ET
  • Where to watch: DBACKS.TV, Rockies.TV

Home run pick: Shea Langeliers (+350)

Jose Soriano has fallen out of form, allowing 15 runs over his last 22 innings. The command is wavering, the double-digit strikeouts are no longer showing up, and Shea Langeliers has been a major problem for him.

The BlastContact darling has already taken Soriano deep twice in 11 at-bats while posting a 1.765 OPS in the matchup. He hasn’t had the best series so far, but getting plunked twice yesterday could provide some added motivation for a hitter sitting on 12 home runs and batting .322. Only four players have a higher slugging percentage than Langeliers this season.

The Los Angeles Angels bullpen is also capable of cashing this HR prop. It owns the second-worst ERA on the season, and that mark has been even uglier over the last two weeks (6.60). It’s extremely fly-ball heavy, and its HR/FB rate also sits in the Bottom 3 in baseball.

  • Time: 9:38 p.m. ET
  • Where to watch: NBC Sports California, ABTV
Josh Inglis' 2026 Transparency Record
  • HR picks: 13-83, -15.94 units

Today’s HR parlay

Rockies Hunter Goodman Bet Now
+10600
Diamondbacks Corbin Carroll
Athletics Shea Langeliers

Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
Affiliate Disclosure: Our team of experts has thoroughly researched and handpicked each product that appears on our website. We may receive compensation if you sign up through our links.

Pages related to this topic

Josh Inglis - Covers
Betting Analyst

Josh Inglis is a rising star in the sports betting content space, specializing in MLB, NHL, and NFL markets. Since joining Covers in 2019, Josh has focused his betting expertise on player props and derivative markets, finding them easier for beating the closing line compared to sides and totals. His engaging analysis and content have been showcased on major networks such as TSN, VSiN, BetMGM Network, and NBC. Josh is a prolific bettor, tracking over 2,500 bets annually and he consistently shares his results through monthly transparency reports. At Covers, he is renowned for his MLB release shows and NHL Puck Props, which are integral parts of the site's live content lineup.

Before his tenure at Covers, Josh spent a decade teaching while pursuing sports media on the side. He has also contributed to live global senior-level broadcasts for the WBSC.

Josh advocates for sports bettors to bet early, emphasizing the importance of securing better numbers by beating the public to the market. He also advises having multiple sportsbook accounts to ensure access to the best possible odds.

Popular Content

Covers is verified safe by: Evalon Logo GPWA Logo GDPR Logo GeoTrust Logo Evalon Logo