In baseball, to tag up is to retouch or remain on the runner's time-of-pitch base until (after) the ball is first touched by a fielder. A runner must, by rule, tag up only when a batted ball is touched by a fielder. After a legal tag up, even if the ball was caught in foul territory, runners are free to attempt to advance.[1] On long fly ball outs, runners can often gain a base; when a runner scores by these means, this is called a sacrifice fly.[2] On short fly balls, runners seldom attempt to advance after tagging up.
After a caught fly ball, if a fielder with the ball can appeal that the runner did not retouch his time-of-pitch base after the ball was touched by a fielder by touching the runner or the runner's time-of-pitch base before he retouches the base, the runner is out.[3] If the umpire agrees that the runner did not retouch after the ball was touched by a fielder, the umpire will call the runner out, regardless of what the runner had done after the ball is in play. This is a timing play, not a force play. All runs which score before the appeal will count.
References
- ^ Major League Baseball Rules, Rule 7.08(d)
- ^ Major League Baseball Rules, Rule 10.08(d)
- ^ Major League Baseball Rules, Rule 7.10(a)
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