Quick Answer
Hits + Runs + RBIs is an MLB combo prop that adds a batter’s hits, runs scored, and runs batted in into one number, and you bet the over or under on the posted line.
Quick answer: A hits + runs + RBIs prop (books shorten it to HRR) settles on the sum of a hitter’s hits, runs, and RBIs in a single game. Most regulars get a line of 1.5, table-setters and light bats sit at 0.5, and elite middle-order hitters see 2.5. Juice runs -110 to -140 per side. You need production across three categories, so the bet is really about lineup slot, on-base skills, and who hits behind him.
What the Stat Measures
Three box-score columns added together. A single that drives in a run counts twice: once as a hit, once as an RBI. A walk that turns into a run scored counts once. A homer with a man on counts three times (hit, run, two RBIs would be four). Books grade off the official MLB box score, and the bet settles at the end of the game regardless of extra innings. Most books count extras; check house rules if a game goes long.
How It’s Calculated
No formula. HRR = Hits + Runs + RBIs, straight addition from the box score. The projection side is where the math lives. A model builds expected HRR from projected plate appearances, the hitter’s hit rate, his on-base skills, the lineup around him, and the opposing pitcher’s run prevention. Plate appearances matter more than anything. A leadoff man in a game with a high implied team total might see five trips; a nine-hole hitter in a pitcher’s duel might see three.
What’s a Good Number
For a full-time starter, an average game lands somewhere between 1.5 and 2.5 HRR. Anything at 3 or above is a strong night. Over a season, the league’s best hitters average roughly 2.3 to 2.6 HRR per game; a weak nine-hole bat sits closer to 1.0. If a guy’s season average is 1.4 and the book posts 1.5 with the under juiced to -130, the market already did the work for you.
How It’s Bet
Standard lines: 0.5 for bottom-order bats and part-timers, 1.5 for most starters, 2.5 for the handful of elite bats (think a healthy cleanup hitter on a top-five offense). The over 1.5 at even money on a leadoff man facing a gas-can starter is the classic square play, which is why books tax it. What moves the number: lineup card (a guy bumped from seventh to second gains real expectation), the opposing starter and bullpen, park factor, weather (wind out at Wrigley inflates everything), and the implied team total. Team total is the single best proxy. If his team’s implied runs jump from 4.2 to 5.1, his HRR over gets real value. The trap: RBIs depend on teammates getting on base, so a leadoff man with nobody hitting behind him has a capped ceiling even on a good night.
Betting Example
Say a leadoff man with a .345 OBP faces a starter with a 4.80 ERA and a bullpen game behind him. His team total opens at 5.2. Books hang HRR over 1.5 at -115. His season HRR average is 1.9, and in games where his team is implied for five-plus runs it jumps to 2.4. That’s an over bet. Now flip it: same player, but the opposing ace is dealing, the team total is 3.4, and the two-hole hitter behind him is scratched. Under 1.5 at even money becomes the play. Same hitter, different game, different bet.
Frequently Asked Questions
Do walks count toward hits + runs + RBIs?
Walks don’t count as hits, but they help the other two categories. A walk that becomes a run scores one point. A bases-loaded walk drives in an RBI. Patient hitters grade out better than their batting average suggests in this market.
What’s a typical HRR prop line?
1.5 is the standard for everyday starters. Punch-and-judy hitters and nine-hole bats get 0.5. Elite run producers on strong offenses get 2.5, usually with the under juiced.
Do extra innings count?
At most books, yes. HRR props grade on the full game including extras at the major US sportsbooks. Always confirm house rules, because a few player-prop menus settle on regulation.
Why did my guy’s line move from 1.5 to 2.5?
Usually a lineup change (moved up in the order), a pitching change by the opponent, or a steam move on the team total. The HRR line tracks team scoring expectation more than it tracks the individual hitter.
Is HRR better to bet than a straight hits prop?
Different animal. Hits only is higher-variance per at-bat but insensitive to lineup context. HRR rewards complete games and good lineups. PropsBot models both daily, and the edge usually shows up in whichever market the public ignores that day.
Part of the PropsBot.AI Sports Betting Glossary. Updated 2026-07-24.
