What is Pop Time? Definition, Formula, and Example
Pop time is the number of seconds from the instant a pitch hits the catcher's mitt to the instant the ball reaches the fielder's glove at the base on a throw to second or third, measuring a catcher's total throw-down quickness.
What is Pop Time?
Pop time is a Statcast catcher metric that measures how long it takes a catcher to catch a pitch, transfer the ball, and deliver it to the base on a steal attempt. The clock starts the instant the pitch strikes the catcher's mitt and stops the instant the ball lands in the infielder's glove at second or third base. It's the single cleanest number for evaluating a catcher's throwing quickness because it bundles footwork, exchange, arm strength, and throw accuracy into one elapsed time.
How Pop Time Is Calculated
Pop time has two components that Statcast tracks separately:
Pop Time = Exchange Time + Arm Time
- Exchange time: seconds from ball hitting mitt to ball leaving the throwing hand. This captures the catcher's transfer and release.
- Arm time: seconds from release to ball reaching the base. This is a function of throw velocity and trajectory.
Statcast uses Hawk-Eye tracking to timestamp both the pitch's entry into the catcher's glove and the ball's arrival at the receiving fielder's glove, then publishes the split on Baseball Savant. Only throws on actual stolen-base attempts or pickoffs to second or third count toward a catcher's official seasonal pop time.
League-average pop time to second base is about 2.00 seconds. Elite is under 1.90. Anything above 2.05 is a red flag.
Worked Example
Patrick Bailey of the Giants led MLB with an average pop time around 1.86 seconds to second base in 2024, with throw velocities north of 86 mph. J.T. Realmuto has long been the standard-bearer at 1.88–1.92 depending on the season. Jose Trevino and Gabriel Moreno both sit around 1.88–1.90. Salvador Perez, despite his elite arm strength, posts pop times closer to 1.93–1.96 because his exchange is a tick slower than the quickest guys. For context, the theoretical cap is about 1.80 — at that point you're asking for a 90 mph throw with a sub-0.65 second exchange, which very few human beings can execute consistently.
Throw-outs scale with pop time: catchers under 1.90 caught roughly 30%+ of runners in 2024, while those above 2.00 fell into the low 20% range.
Why Pop Time Matters
Pop time is the primary deterrent against the running game. With the pitch clock and larger bases making steals easier post-2023, league stolen-base attempts jumped ~40% and success rates climbed above 80% — which puts a premium on catchers who can hold runners close. A catcher with sub-1.90 pop time can erase would-be base stealers even against pitchers with mediocre times to the plate.
Front offices weigh pop time heavily in free-agent catcher contracts, and it often separates defensive-first backstops from purely bat-first ones. Fantasy managers can mostly ignore it, but daily DFS players use it when projecting stolen-base totals for opposing lineups.
Limitations and Common Misconceptions
Pop time is not the whole throwing story. A catcher with a 1.88 pop time who sprays throws into center field gives up as many bases as a slow-and-accurate one. Statcast publishes throw velocity and accuracy separately for that reason. Pop time also depends on pitch location — a pitch up in the zone is easier to handle than a ball in the dirt, and catchers tend to post their best pop times on fastballs over the plate.
Crucially, pop time does not equal caught-stealing percentage. A catcher behind a pitcher with a 1.45-second time to the plate will throw out more runners than a better catcher behind a pitcher at 1.35 seconds. The sprint speed of the runner also matters — Bailey's 1.86 still loses to a 30 ft/s runner if the pitcher delivers slowly.
Related Terms
In Legends Deck
Catcher cards in Legends Deck carry a Throwing rating derived from pop time, throw velocity, and caught-stealing percentage. A Patrick Bailey–tier card shuts down base-stealing attempts on the simulation's stolen-base resolution roll, while a below-average pop-time catcher gives speed-heavy lineups a real advantage. It's the main reason defense-first catchers remain valuable in the game even when their bats don't match their gloves.