Balll enters dead ball territory - one base or two?

[backstop09]

NFHS - Ohio high school. Runners on 2nd and 3rd. Pickoff attempt at third (throw from catcher). Ball goes off third baseman's glove and rolls toward fence. Goes under a gap in the fence and outside the playing area. Home plate umpire only awards each runner one base. Is that correct?

 

[BretMan2]

The correct award for a thrown ball going out of play is two bases, established from the runner's positions at the time the throw was made.

Two runs should have scored on this play.