A pitching training device generally having a platform with a generally T-shaped end and a raised pitchers rubber configured to support the pitcher during delivery of the underhanded pitch, and a pair of removable heel guides to inhibit rotation of a drive foot of the pitcher. A stride section, removably connected to and positioned to extend longitudinally from said generally T-shaped end. A goal post assembly configured to movably position a stride bar across the stride section. The stride bar is positioned as a target for a drive foot of the pitcher to clear a predetermined height during the underhanded pitch. The device is lightweight and portable, useable indoors or on a practice field and is operable for left or right handed pitching.