Visible crew/equipment: When Roy and Johnny are stuck in the elevator with the cardiac patient, the outline of the lav mic transmitter is visible on the front, left side of Roy's shirt, above his belt.
Visible crew/equipment: When the boy who was shot by a pellet gun is wheeled into the treatment room, at the start of the next shot there is a closeup of the domed surgical light fixture, which provides a reflection of crew and equipment, albeit upside-down.
Visible crew/equipment: When the injured father and daughter are wheeled into the treatment room, an actor's tape mark is visible on the floor under the daughter's gurney, and another tape mark is visible on the floor under the father's gurney.
Visible crew/equipment: When Roy is in the ER due to the dizziness, two actors' T-marks are visible on the floor near the door, where moments later Dr. Bracket and Dr. Early stand before leaving. Additionally, Dr. Early's mark (during The Exam) becomes visible when Dixie shifts her position, just as Dr. Bracket asks, "Any pain here, Roy?"
Visible crew/equipment: When Station 51 arrive at the movie studio, after the car's explosion Captain Stanley tells dispatch to respond another engine, mobile aid unit, and another ambulance. In the next shot from the interior of Engine 51, the cameraman and camera are visible in the passenger side mirror.
Loose Ends - S6-E12
Visible crew/equipment: When the guys bring Brackett to the hospital after his car accident, two white tape, and one black tape actors' T-marks are all visible on the floor in the ER.
Fair Fight - S6-E5
Visible crew/equipment: After the cave-in rescue, when Dixie, DeSoto and Gage are in the ER, Gage washes his face and as he comments that he wasn't cut out to be a mole, two tape marks are visible at his feet.
Visible crew/equipment: When Mr. Grady (self-defense instructor) is in the ER, being examined by Dr. Brackett, there is a visible T-mark on the floor behind Gage.
Visible crew/equipment: When squad 51 parks upon arrival at the gas station the array lighting is visible on the driver's door.
Captain Hook - S6-E8
Visible crew/equipment: After Station 51 is dispatched to "aircraft down," just as the squad and engine roll up on the scene, the reflection of the camera crane can be seen on Engine 51's windshield.
Paper Work - S6-E11
Visible crew/equipment: At the warehouse, when the foreman yells at Ed for stacking the flammable nitromethane steel drums unsafely, the outline of the mic transmitter is visible on the front left side of Ed's T-shirt.
Visible crew/equipment: When Station 51 is being dispatched to 'man down' at the hotel, in the overhead shot of the apparatus bay as the guys are getting into the rigs, the reflection of moving production equipment can be seen on Engine 51's windshield.
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: 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.
Visible crew/equipment: During the rescue at the jail, while Roy is hanging on the line, the outline of the mic transmitter is visible on his shirt at his left side.
Fair Fight - S6-E5
Visible crew/equipment: When Johnny and Roy get back to the station and walk into the day room, right after Marco says, "Well, either he's sick, or he's the laziest dog ever lived," we can see the shadow of the boom mic moving back and forth across the top of the wall, on the right.
Visible crew/equipment: After Station 51 is dispatched to the fire at a singles club, when Engine 51 pulls into the parking lot it and then turns around, the reflections of multiple array lighting can be seen on the engine's surface and Mike's window when he opens the door.
Loose Ends - S6-E12
Visible crew/equipment: During the fire at the train yard, when they carry out the second toxic fume inhalation victim from the boxcar, just before they pass the camera, the shadow of the camera tracking backwards is visible on the boxcar, to the left.
Visible crew/equipment: When Station 51 is being dispatched to 'auto accident with injuries' there's a closeup of Sam Lanier, the dispatcher, and in the next overhead shot of the apparatus bay, we can see the reflection/shadow of equipment moving on Engine 51's windshield, at the bottom left corner.
Captain Hook - S6-E8
Visible crew/equipment: When Roy, John, and Chet are standing near the stove talking about Hookrader's party, just as John tells Chet, "And you! You with that speech!" they walk towards the table, and the shadow of the overhead boom mic swoops across the cabinets on the right.
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 ★