Ground ball to third base batter-runner out

Situation

0 outs ~ 0 runners

1. From A position, U2 moves to infield with 90 degree angle from throw to 1B
2. UIC follows batter-runner toward the 45′ line
3. UIC watches to help with pulled foot or tag on errant throw

Note: UIC monitors all overthrows for entering dead ball territory past 1B