St. Louis Cardinals vs Kansas City Royals Home Run Picks Today (6/21)
In Summary
- Jordan Walker is the headline home run bet for St. Louis Cardinals vs Kansas City Royals — best price +475 at Unibet.
- We compared every sportsbook's "to hit a home run" price for this game; the table below shows where each play pays the most.
- A home run prop's payout swings a lot book to book, so always take the best available number — that's the whole edge.
See the full slate: all of today's best home run bets, ranked by price, are in our MLB Home Run Picks Today hub.
Here are the top home run bets for St. Louis Cardinals vs Kansas City Royals on June 21, 2026, with the best price on each across 100+ sportsbooks. "To hit a home run" is the over 0.5 home runs market; the odds below are the best available right now, so shop them on the OddsShopper home run odds screen before you bet.
Best Home Run Bets for This Game
| Player | Best HR Price | Best Book | Implied | Books |
|---|---|---|---|---|
| Jordan Walker (STL) | +475 | Unibet | 17.4% | 32 |
| Jac Caglianone (KC) | +500 | BetMGM | 16.7% | 32 |
| Carter Jensen (KC) | +550 | Fanatics | 15.4% | 31 |
| Alec Burleson (STL) | +575 | Unibet | 14.8% | 31 |
| Salvador Perez (KC) | +575 | Bet365 | 14.8% | 31 |
| Lars Nootbaar (STL) | +635 | Underdog | 13.6% | 31 |
| J.J. Wetherholt (STL) | +700 | Unibet | 12.5% | 31 |
| Ivan Herrera (STL) | +750 | Bet365 | 11.8% | 31 |
The Top Play: Jordan Walker
Jordan Walker carries the shortest home run price in this game at +475 (17.4% implied), and the best number is at Unibet across the 32 books pricing it. On a payout-driven market like home runs, the gap between the best and worst book is real money, so the number you take matters as much as the player you pick.
Best Value: Jac Caglianone
For more payout, Jac Caglianone is priced at +500 (16.7% implied), best at BetMGM. Longer home run prices are high-variance by nature, so size these small and treat them as upside swings, not anchors.
How to Bet Home Run Props the Smart Way
- Shop every book. The same home run prop can pay 100+ points more at one book than another. OddsShopper scans 100+ sportsbooks so you always take the best number — see the live home run board.
- Mind the price, not just the name. A great hitter at a short price can be worse value than a mid-tier bat the market is sleeping on. Compare the price to the field before you fire.
- Size for variance. Home run props are longshots; keep the stakes small and play the long run.
New to OddsShopper? It scans 100+ sportsbooks in real time and flags the best price on every home run prop (and where it's actually +EV), doing automatically what this article did by hand. Try OS Pro free for 7 days, and code SMARTBET20 takes 20% off your first payment if you subscribe.
FAQ
Who has the best home run odds for St. Louis Cardinals vs Kansas City Royals today? Jordan Walker at +475 (Unibet) is the shortest price; the table above lists the best book for every play. What does “to hit a home run” mean? It's the over 0.5 home runs prop — the player hits at least one home run. The odds and best book vary by sportsbook, so compare before betting. Where can I shop St. Louis Cardinals vs Kansas City Royals home run prop odds? OddsShopper's live home run board compares every sportsbook's price in real time so you always take the best number.
Odds shown are the best available as of publication and move quickly. Shop live prices on OddsShopper. Bet 21+ where legal; play responsibly.
