I did just post the rules regarding a catch, and I’m asking where anything is mentioned about a ball moving while being in the glove. It’s impractical to expect a ball to hit the mitt and just “stick.” It doesn’t happen. Bobbles are generally obvious. This was far from it. Force plays are the only relevant situation where the definition of ball security would come into play, and I’d like to know the answer to this myself. I suspect it’s not something anybody can definitively answer. I’d be willing to guess there’s some ball movement on a majority of force plays, and the case could be made that if the ball never leaves the glove (it didn’t) then the catch is made when the ball hits the glove. I mean, we’re talking in hundredths of a second here.
I agree...good points. in this instance tho I think that if there was a bobble it was ‘controlled’ before the runner hit the bag. other times, no you are correct and if the fielder is acting like the ball is a mexican jumping bean, then no...runner safe no matter how much earlier the ball arrived.