In this episode there is a scene where Leela is pitching and a woman from the audience stands up and yells "Throw like a girl!" in a supportive manner. Later, that same woman appears to be Jackie Robinson.
Maybe the women were different, but I remember them looking the same. If it's the latter, I wonder if this was somewhat of a continuity error. Or maybe Jackie had a sudden change of heart about what Leela was doing and became determined to be the first good female Blernsball player. I checked the capsule for this episode and didn't notice anything mentioned about Jackie, so maybe the appearance thing is all in my head