What a One Run Line Means: Guardians -1 and the Sept 18 Card

Guardians -1 sits between the moneyline and the standard run line. Here is what it buys, and the rest of Friday's card.

Most people who bet baseball know two ways to take a favorite. You can lay the moneyline and just need a win, or you can take the run line at -1.5 and need a win by two. There's a third option a lot of books hang between those two, and it's the biggest ticket on today's card: Cleveland Guardians -1 at -180.

Three ways to bet the same Cleveland win

Here's how the three prices lined up on the TrustMyRecord board Friday morning for Athletics at Cleveland:

The only game that separates these three bets is the one run Cleveland win. The moneyline pays you for it, the -1.5 charges you for it, and the -1 hands your money back. That's the whole trade. You're paying less juice than the moneyline because you've given up the one run win, and you're paying more than the -1.5 because a one run win no longer costs you anything.

How often does that one run game happen?

More than people think. Of the 2,295 MLB games played from March 25 through September 17 this season, 637 were decided by exactly one run. That's 27.8 percent, better than one game in four.

Cleveland's own numbers make the point. The Guardians have won 78 games this year, and 24 of those were by exactly one run. On a -1.5 ticket, every one of those 24 would have been a loser. On a -1 ticket, all 24 would have been a refund. At home the share is even higher: 14 of their 38 wins at Progressive Field came by a single run.

So when does -1 make sense? When you believe the favorite wins, and wins with some room, but you don't want a one run game to beat you. The break even math: at -180 you need to win 64.29 percent of the games that aren't pushes. At -225 on the moneyline you need 69.23 percent of all games.

Why Cleveland, and why today

Cleveland is 78 and 75 and tied with the White Sox for first place in the AL Central. The Athletics are 61 and 92, have lost three straight, and they've been outscored by 214 runs this season. On the road they've lost 30 games by two runs or more, against 16 one run road losses.

The Athletics are starting Mason Barnett, who has a 7.08 ERA with 12 home runs and 24 walks allowed in 40.2 big league innings. His last big league outing, August 17 in Kansas City, lasted 2.2 innings and cost six runs. Cleveland's side is probably a bullpen day: Daniel Espino has worked mostly in relief, and his one start this month was two scoreless innings in Minnesota.

A starter who puts men on base and gives up home runs is exactly the kind of matchup where a win tends to come with a margin, and the -1 protects the one outcome that would otherwise sting.

The rest of the card, in one line each

• Royals team total under 3.5, -125. Kansas City is 28 and 50 on the road and faces Paul Skenes, who has a 3.70 ERA and 110 strikeouts in 87.2 innings at PNC Park.
• Blue Jays moneyline, -132. Dylan Cease has a 1.89 ERA in 13 road starts. Kumar Rocker has a 5.02 ERA at home.
• Braves team total under 4.5, -139. Atlanta has scored four runs or fewer in seven of its last ten games.
• Mariners moneyline, -181. Bryan Woo hasn't allowed an earned run in his last 14 innings, and the Rockies are 1 and 9 in their last ten.
• Yankees moneyline, -110. New York is 46 and 32 on the road with a run differential of 136. Arizona's run differential is exactly zero.

Every price on this card is laying juice, so the units are what each ticket wins: 11.5 units to win in total. All six plays were posted before first pitch on the verified BetLegend record at trustmyrecord.com, where they're graded win or lose. For the full slate with every probable starter, see today's board.