Continuity mistake: During the structure fire at Kiddytime Toy Factory, when the man is downed by an electrical shock, Johnny pulls out the defibrillator and Biophone from the squad, and in Johnny's closeups with the Datascope we can see that its center knob on the right is missing, but in the Datascope's closeups the knob is back.
Visible crew/equipment: When Engine 51 arrives at the toy factory fire and comes to a full stop, we see the hunched over cameraman holding a handheld camera, with another crew member standing right behind him, and just as Captain Stanley opens the door and emerges, we see the cameraman being helped up and both men turning and moving quickly to their left, as Captain Stanley jumps off the engine.
Other mistake: When the deaf woman is delivering a baby, the subtitles read that Johnny is saying, "The head is rotating," when in fact it's Roy saying that. Subtitles from Universal Studios 2010 DVD.
Visible crew/equipment: When Art, The Screenwriter, goes on his first ride-along with Squad 51, just as Art rambles on about the fire truck on its mission of mercy going 80 miles an hour, two shadows of mic/camera equipment are visible on the left and right side of Squad 51's hood. What's amusing is that a moment prior to this, Art actually says that they could mount a camera right on the hood of the truck, when they make the film about paramedics.
Continuity mistake: When 51's guys go down into the tank to try and subdue Al, the big guy who has a chemically induced psychosis, the ring Al was wearing on his left hand in the overhead shots is gone, but when Al shakes Chet upside-down in the closeups the large ring is back, but then it vanishes again.
Visible crew/equipment: When we hear Station 51 being dispatched to the structure fire at Kiddytime Toy Factory, just as Roy rushes to the squad's door to open it, we can see the reflection of the camera dolly through the squad's windshield as it moves.
Visible crew/equipment: After Art tells Johnny that a film about paramedics is passé, but he'll invite him to the doll movie premiere, Johnny walks over to the ambulance, and the outline of the mic transmitter is visible on the back of Roy's shirt, at his right.
Continuity mistake: When Brackett is talking to Roy and Johnny in the hallway outside treatment 3 about the guy who will likely lose his injured leg, Brackett is wearing a tie with a pattern, and when he walks into treatment 3 Brackett's tie is tied differently.
Revealing mistake: When Johnny, Marco, and Chet are all on top of Al, the big guy who has a chemically induced psychosis, while Roy injects Al with diazepam we can see the outline of the knee pad that Marco is wearing under his pants. As an aside it's funny to watch Chet's face hamming it up during this scene.
Continuity mistake: When Dick introduces Art Fromich to Roy and John, in the wide shots the Biophone is lying on its side atop the squad, but in each of Roy's closeups the Biophone is upright.
Visible crew/equipment: When Station 51 is dispatched to the industrial accident, with the big guy suffering from a chemically induced psychosis, the outline of the mic transmitter and wire are visible on the right side of the big guy's T-shirt.
Visible crew/equipment: When Station 51 is dispatched to the structure fire at the Kiddytime Toy Factory, while en route there's a shot from the POV of the top of Squad 51, and the reflection of the cameraman and the camera can be seen on the lightbar's chrome surface.
Visible crew/equipment: After the fire at the Kiddytime Toy Factory, when Roy is in the ambulance and Johnny closes its back doors, the location set lighting is reflected on the glass of the ambulance doors.
Visible crew/equipment: When the dispatcher calls for Station 51 to respond to the "structure fire at the Kiddytime Toy Factory," while Captain Stanley is at the radio receiver base station, the reflection of the camera equipment is visible on the back of the squad's cab as it trucks left.
Continuity mistake: When the deaf woman is lying on the sidewalk having contractions, Johnny and Roy carry the pregnant woman on a cot into the market, and in the closeup of her face she is still lying on the sidewalk outside.
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 ★