Medical Definition of Z LINE. : any of the dark bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres.Britannica.com: Encyclopedia article about Z line.efinition of Z LINE. : any of the dark thin bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres. ADVERTISEMENT.
The average fb speed in the MLB is 91-92ish. Catchers compete with this when trying to throw down a runner at 90ish. The average throw speed from third base is 80 MPH. As for the rest of the positions I am not sure of the exact average, but it is not as fast or faster than pitch speed.
No one has discussed getting a 95 MPH right into your âfamily jewelsâ where the catcher is doubled up and the umpire cleans off a spotless home plate just to allow the catcher to catch his breath. Because of the intelligence required to play catcher, most MLB managers played catcher in their playing days. Your best managers were catchers because they understand how the game needs to be played.