The area's best non-high school football team does not play at Texas Stadium. (Gee, ya think?) It is not the SMU Mustangs. (Gosh, ya sure?) No, the area's best footballers lay claim to Birdville Stadium in North Richland Hills. The Dallas Diamonds, the all-woman semipro football team--led by rookie linebacker/fullback Jessica Springer (the 5-foot-9, 210-pound can of whupass)--has pasted some of its early-season opponents, especially the Missouri Prowlers, whom the homegirls have beaten twice by a combined score of 138-0. Hey, Bill Parcells, you got a scout at their games yet? Couldn't hurt.