Carlos losing his focus -- his description -- manifests in all kinds of ways. He can start to slow his pace. He can start missing his spots. He can veer off into arguments with umpires. Usually a good sign of it is a climbing pitch count and a first inning that balloons.
As for Molina, yes, he jumps first pitches. The Cincinnati RBI was signature Molina. Runner on base. Find a way to get him in. He's one of the teams best bits with hit and runs. He is one of the best at knowing how to at the very least get a sac fly when it's needed. And unlike some of his peers -- Carpenter, for example -- he has enough bat control to beat shifts and adjust between a home-run swing and a get-on-base slash. Without having a live call to readers/listeners during the game, it's not easy to say, hey, here's this coming and why. Good broadcasters do that. I hear Dan and Jim do that on games often. Dan works the game like a manager, pointing out potential traps and pending decisions ahead of time. I think Mike Shannon has a more old-school approach, one that a lot of fans love, of course.
Since 2019, 200 MLB players have totaled 500 or more at-bats. Only 2 have swung at a higher percentage of first pitches than Molina (46.1) Right behind him is Luke Voit.
For kicks, ask DG who called Molina's RBI in Cincinnati. Too bad I wasn't on a broadcast!