The Baltimore Monuments have one less of those precious few open spots for tryout hopefuls at Bowie this week and next - they've signed for the inaugural American Professional Slo-Pitch Softball season "one of the most outstanding outfielders in the country." Ta-da! It's Johnny Dollar, "two-time member of a dozen MVP awards in tournaments around his home Tidewater Virginia region and on up . . . Nadia Comaneci has surfaced with her first public appearances of 1977; the Olympic gymnastic queen performed at Cluj, Romania, in an earthquake benefit show. Romanian reporters said she looked fit, made a good impression; has grown taller and heavier, and, having turning 15 last fall, might have had "some problems" with the "critical age" . . . Times flies and Washington's Esther Stroy, who sprinted onto the 1968 U.S. Olympic team at 15, is marrying today at Howard U., where she's been a student. She'll become Mrs. Frederick Carlton at an African ceremony in Andrew Rankin Memorial Chapel.

Meanwhile, if anyone is still watching, here is the upcoming schedule for the King-ABC U.S. Boxing Champtionships.

This Sunday at Randolph AFB, Sand Antonio, The, last quarterfinal round: heavyweight, Lerey Jason vs. Dine Dennis; light heavies, Rouzell Johson vs, Tony Greson; middles, Dobby Watts vs. David Leve; welters, Migtol Barrois vs. Floyd Mayweather; lights, Greg Ceverson vs. Jerry Korane; feathers Warren Mathews vs. James Marinez; rescheduled after being blocked by injunction of Marrion, Cigco - light heavies Richie Kates vs. Tom Bethea, and if Bethea is still restrained by New York court, Jacobs Burnett replaces him.

April 2 in Freeman Memorial Coliseum, San Antonio first set of semifinals: junior welterweights Saout Mamby vs. Mike Everett; lightweight Ruby Oritz vs. Johnny Sullivan; feathers Ruben Castide vs. Walter Society.