TV technology for baseball games has progressed to the point that they can show a baseball's path with a clearly illustrated arc showing its path.
This might be achievable in real life by having a smoke emitting pyrotechnic device that ignites when struck by the bat.
The pyrotechnic device inside will mix more of a particular chemical with another depending on how hard it's hit. The harder it's hit, the redder the smoke. A lightly hit ball will emit blue smoke.
"Wow! He red streaked it out of the park!" They might say. Or "Just a blue bouncer to second for an easy out."-- doctorremulac3, Dec 03 2016 Smokin_27_20Shot [calum, Dec 03 2016] Scrotum_20Thurible [calum, Dec 03 2016] I thought you meant after the pitcher released the ball. There'd be be lingering trail of smoke showing how much of a corkscrew or riser was thrown. Good idea either way.-- AusCan531, Dec 03 2016 Redundant - see other HB ideas for following balls with a smoking trajectory....... too lazy to look up zzzzzzzzzzzzz-- xenzag, Dec 03 2016 Ok, found it, a smoking soccer ball.
I neglected to say that mine is multi color. See additional notes.-- doctorremulac3, Dec 04 2016 random, halfbakery