An Ounce of Prevention - S6-E13
Continuity mistake: When Roy and Johnny are rehearsing in front of Captain Stanley and the other guys, after Johnny uses the bug spray on the flame, in the wide shots Roy's hands are in his pockets and the hairspray can is on the table, but in the closeups Roy's still holding the hairspray can.
An Ounce of Prevention - S6-E13
Visible crew/equipment: After the rescues at the ferris wheel, when Dixie walks in while Brackett is examining the patient, the actor's black tape mark is visible on the floor, just as Morton and the nurse switch places.
An Ounce of Prevention - S6-E13
Continuity mistake: While at the Tom Jensen Show, after one of their crew receives an electrical shock, Roy comes back from the squad and carries the drug box in his right hand and Biophone in his left, but next shot they've switched hands.
An Ounce of Prevention - S6-E13
Continuity mistake: When Roy and Johnny walk into the day room all spiffy and ready to leave for the Tom Jensen Show, Chet's legs go back and forth from being uncrossed to crossed, depending on the angle of the shot. As an aside, something to watch for is Henry the dog burying his face between Chet's legs, and Chet's reaction.
An Ounce of Prevention - S6-E13
Continuity mistake: During the rescue up on the ferris wheel, Johnny's uniform shoes have changed into shoes with flat soles.
An Ounce of Prevention - S6-E13
Visible crew/equipment: When Station 51 is dispatched to the man who's ill on the ferris wheel, just as Engine 51 rolls out of the apparatus bay, in the closeup we see the reflection of the array lighting and the reflector screen on the side of the engine.
Continuity mistake: When Roy, John, and Marco walk into the rec room while Chet is trying to wax the floor, Marco is wearing a ring on his left hand in the wide shots, but in the closeups with Captain Stanley the ring is gone.
Revealing mistake: At the gas station with the broken pump nozzle, Captain Stanley and the station attendant head to the garage area to see the main shut-off circuit box, which is located at the far right corner of the garage, but in the next shot, we can see the attendant's reflection behind Roy, and he's standing somewhere else off camera, not where he's supposed to be in the next shot with Captain Stanley.
Visible crew/equipment: At the skating rink, when the guys start walking on the ice and go to the two clowns, the outlines of the mic transmitters and wires are visible on Johnny's shirt, as well as on the back of the blonde skater's green outfit. Then, when the ambulance attendants are walking on the ice, the outline of the lead attendant's mic transmitter is visible on the front of his shirt.
Visible crew/equipment: At the gas station with the broken pump nozzle, when Roy and Johnny are tending to the woman with the cut on her head, the outlines of Roy's mic transmitter and cable are visible on the left side of his shirt, above his belt. Additionally, note that the office's left pane of glass has been removed to prevent the reflection of the camera facing it.
Visible crew/equipment: When squad 51 parks upon arrival at the gas station the array lighting is visible on the driver's door.
Other mistake: When Station 51 is dispatched to the "freeway accident," as the engine and squad roll out of the apparatus bay, we can see the real 127's vehicle still parked in the bay, near the rear door.
Visible crew/equipment: When Station 51 is on scene at the freeway accident, after the two girls are rescued from the wreck, when the explosion occurs Roy and John dive to the ground, and as the camera zooms out we can see the top of the location's array lighting unit, just past the engine's hose bed at the bottom left corner.
Continuity mistake: At the gas station, when Captain Stanley asks Marco to open the gas pump and close the shut-off valve, Marco is wearing two rings - one on each of his ring fingers, but when he is nearly electrocuted both rings have vanished.
Visible crew/equipment: When Chet is trying unsuccessfully to get Henry to use the dog house, the outline of the mic transmitter is visible on Chet's back.
Revealing mistake: At the gas station, when the pump sparks and catches fire, we can see that it's not gasoline on the ground with the water from the fire hose, but instead it's floating thick gobs of stunt fire gel with burning flames.
Visible crew/equipment: When the guys are at the gas station with the broken pump nozzle, after Marco and the stretcher are loaded onto the ambulance, the reflection of the location array lighting can be seen on the back of the ambulance, when Johnny shuts its doors.
Other mistake: While Charlie is trying to figure out what's wrong with the squad, when Captain Stanley, Roy and John are sitting around the table, there's a can of scouring cleanser which has yellow tape covering the "a" and "x" so all we see is the "ja" on the can, in order to hide its brand name, which is Ajax.
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.
Continuity mistake: While Charlie is finishing up on the squad's engine, Captain Stanley hands Johnny the address in the canyon that has overgrown weeds, and when Johnny packs up the toolbox, Charlie holds out the roll of electrical tape and the combination wrench, with its open-end up. However, in the next shot the only thing Charlie holds out is the wrench, but with its box-end up.
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 ★