MLB Prop Bets: Kansas City Royals vs St. Louis Cardinals (June 21, 2026)
The St. Louis Cardinals (40-34) face the Kansas City Royals (32-45) at Kauffman Stadium on Sunday at 2:10pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Dustin May is the probable pitcher for the Cardinals, while Stephen Kolek is the probable pitcher for the Royals. The Cardinals are favored to win at -122, while the Royals are at +102. The total runs line is set at 9.0, with OVER at -115 and UNDER at -105.
- The Cardinals (+130) have a 45-29 Run Line record this season, while the Royals (-157) hold a record of 35-42.
- The Cardinals have a 33-38-3 O/U record this season (meaning 33 games have gone over the total runs line, 38 have gone under and three have resulted in a push). The Royals have a 36-39-2 O/U record.
Scoring Insights
- The Cardinals are averaging 4.6 runs per game this season (12th in the league). Comparatively, the Royals are averaging 4.2 (21st).
- In the field, the Cardinals are allowing 4.5 runs per game this season (17th in the league), while the Royals are allowing an average of 4.7 runs (20th).
Let's take a look at how these teams perform in some other key statistical areas.
Batting Insights:
Batting Average
- Looking at their batting averages this season, the Cardinals are at .247 (ranking 12th in the Major leagues), while the Royals are batting .247 (11th).
Home Runs
- In terms of total home runs this season, the Royals have hit 73 (25th in the Major Leagues). Meanwhile, the Cardinals have managed 83 (T17th).
Runs Batted In
- Finally, looking at their runs batted in, the Cardinals have recorded 325 RBIs to rank 15th in the MLB this season. Comparatively, the Royals have recorded 308 RBIs to rank T20th.
Pitching Insights:
Earned Run Average
- The Royals have an earned run average of 4.48 this season (21st in the Majors), while The Cardinals have an ERA of 4.22 (17th).
Strikeouts
- Turning our attention to total strikeouts, the Cardinals have recorded 566 this season, ranking 28th in the MLB. Meanwhile, the Royals rank 24th for total strikeouts, recording 598.
Opponent Batting Average
- Opponents are batting an average of .252 against the Royals this season (22nd in the Major Leagues). Comparatively, the Cardinals' opponents are at .255 (25th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Cardinals | 14-14-46 | 5-7-26 | 9-7-20 | 5-5-9 | 9-9-37 | 0-0-0 | 4-2-4 |
| Royals | 15-20-42 | 6-11-23 | 9-9-19 | 5-9-21 | 10-11-21 | 0-0-0 | 2-4-4 |
Lead After Three Innings
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Cardinals | 31-20-23 | 15-10-13 | 16-10-10 | 9-5-5 | 22-15-18 | 0-0-0 | 6-2-2 |
| Royals | 25-38-14 | 14-18-8 | 11-20-6 | 10-19-6 | 15-19-8 | 0-0-0 | 5-5-0 |
NRFI/YRFI
The NRFI market is paying -105 and the YRFI is paying -125.
- The NRFI is 39-35 in Cardinals games this season. The Royals have a 39-38 NRFI record.
Last Time They Met
The Royals recorded a 6-5 victory over the Cardinals at Kauffman Stadium on Friday. Jac Caglianone was unstoppable in that matchup, hitting a home run, a single and recording 2 RBIs. The Royals have now won three straight against the Cardinals.
