When it comes to the stolen base, it's not immediately obvious who's to blame for one.
Is it the pitcher, with his slow time to home plate?
Is it the catcher, who has had his pop times and throwing arm measured throughout his time in the game? We make a big deal about big arms like the one Gary Sánchez used to throw 88 mph and nab Julio Borbon this week.

Could it be all on the baserunner? Billy Hamilton has stolen bases against the best batteries, and was recorded running 22 mph this week.
And should we ignore the fielder? Some middle infielders are adept at the swipe tag; others whiff on the runner or let the ball bounce by.
Given all of these things, it's nice to know that smart people are on it. When they put together Deserved Run Average, Jonathan Judge, Harry Pavlidis and Dan Turkenkopf took a look at the running game and came up with Swipe Rate Above Average. They found pitchers are about six times more important than the catcher when it comes to these things. The things they controlled for should seem familiar:
On some level, this means just going out and finding the worst pitchers and streaming against them. Noah Syndergaard! Well, maybe not him. He doesn't hold runners well, but he's also tough to hit against. How about Jimmy Nelson, Ubaldo Jiménez and Matt Andriese, though?
Let's now turn to something easier than targeting specific batteries. The worst teams in the league against the run, using SRAA, are the Yankees, Mariners, Pirates, Rays, Rangers and Padres. If you include the Braves and White Sox, you get the teams that are clearly worse than the pack. Here are a few basestealers that will see these teams in the next month.
David Dahl, Rockies: He's still out there? He shouldn't be. Go get him. Having seven games against the Padres is only part of the reason why he shouldn't be out there.

Carlos Gómez, Rangers: Gomez may have waning athleticism, but it seems like his straight-on running speed isn't that off because he's been successful on 14 of 16 steal attempts. He's hitting at the bottom of the Rangers lineup, but he's playing for them every day, and there's no pesky pitcher behind him. And now he's free in the leagues where he's ended up on the wire. There's probably no better long shot to take, decline or no. Texas gets the Mariners four times and the Rays three times.
Melvin Upton Jr., Blue Jays: The artist formerly known as Bossman gets the Yankees seven times, so he's in a good spot when it comes to stealing bases. However, it is worth mentioning that Sanchez has taken over behind the plate, has a rocket arm and is not Brian McCann. The pitchers are more important than the catchers, but the catcher has improved there. It's also worth mentioning that Upton is not getting on base as much any more, and is therefore hitting lower in the order. He's got some wheels, though, and also gets the Mariners three times, so at least the stars are aligning in that way.

José Peraza, Reds: Eight games against the Pirates is great for Hamilton, but if someone needs stolen bases in your shallow league, there's no way Hamilton is on the wire, even if he's owned in only 76 percent of leagues on Yahoo. However, you might get a reasonable facsimile from the (mostly) everyday middle infielder for the Reds right now. He's not walking at all, but he's making a lot of contact and can run like the wind. It's a little tough for Peraza with incumbents Zack Cozart and Brandon Phillips on the roster, but it is interesting that both of those guys are under contract with the Reds for only one more year. That's why Peraza is playing at both positions.
Chris Owings, D-backs: Perhaps you haven't noticed that Owings is finally healthy and turning in the season that seemed possible for him so far back. He's got some pop (.130 ISO), makes contact, has eligibility all over the field and has 15 steals in 15 attempts. Now he's the shortstop, and he looks legit. He's also getting the Padres six times, which is great news for his ability to steal a base. The bonus is 17 games either at home or in Colorado.

Jake Marisnick, Astros: He's not starting every day, but he's getting into games regularly as the Astros' best defensive center fielder and a replacement for Teoscar Hernández. He gets the benefit of a whopping 12 games against the Rangers and Mariners, which should mean plenty of opportunities against guys like Taijuan Walker and Cole Hamels, who are among the 25 worst pitchers against the running game.
A version of this article also appeared on FanGraphs.com.