[Tru_in_Blu]

Well, baseball would require a mound and a rubber. Don't think you can paint a mound on a turf field.

Softball could have a painted on pitcher's plate. I've seen them at some indoor facilities.

I also saw an outdoor multi-purpose field that used a piece of turf about 4' x 10' that had a pitcher's plate embedded. This was so the distance could be adjusted depending upon age level. It required adjusting almost every half-inning as it would slide/shift due to the pitchers landing spot. Not ideal, but allowed for games to be played on that synthetic field.