Visible crew/equipment: When Charlie's at the station, complaining that every time one of the squads breaks down it's only crying out for mercy against the drivers, and that firemen are the worst thing to happen to the squads, we can see the reflection of the boom mic on the windshield of Squad 51.
Visible crew/equipment: After rescuing the injured worker from the top of the sky-tower at Oceanland Park, when Mike has a problem starting 51's engine, we see reflections of array lighting on the squad's surface. And when Captain Stanley moans that he'll have to call Charlie, he stands in front of the engine and calls out, "Why me?" and one of the location's array lighting units is visible at the left side.
Visible crew/equipment: After Johnny and Roy are called back into the home of the young couple, who were issued the fire-code violation ticket, when Roy is on the Biophone with Rampart, the bulging outline of the mic transmitter is visible at the left side of Roy's shirt, just over his belt.
Visible crew/equipment: When the guys are on the tower ride during the rescue, the shadow of the chopper (and its rotating rotor blades) doing the aerial filming becomes visible, when the ride reaches the bottom. Then the shadow of the entire chopper moves in directly in front of the ambulance, as they load the ambulance.
Visible crew/equipment: When Squad 51 stalls and the guys call for assistance, when Charlie shows up and walks over to the squad, the reflection of the camera rig tracking backward can be seen in the squad's vent window. The reflection of location set lighting is also visible on the spotlight and squad.
Visible crew/equipment: After Station 51 is dispatched to the structure fire, en route Squad 51's engine stalls and starts again, then while they continue driving when the dispatcher cancels the run the reflection of the filming vehicle can be seen on the squad's surface.
Visible crew/equipment: When Charlie stops at the station to service Engine 51, while Roy and John are trying to service the squad, the multiple reflections of location array lighting are visible on Charlie's squad, and on Squad 51's spotlight.
Answer: I was rewatching a few first season episodes of Charlie's Angels (1976), and in S1xE6 "The Killing Kind," I recognized the same actor. So, to finally fully answer your question, the two baseball players in School Days are played by Rod Perry and Sean Fallon Walsh.
Super Grover ★