Yes, I recall De Guzman's jersey number 15. I don't recall the 20 that much though I trust you're correct with the recollection. What I don't understand is why De Guzman was never part of any national team from 1975 to 1979. The other players of the same position that cracked the national team were Legaspi, Lobo, Lauchengco, Jimmy Manansala, among others. And to think that De Guzman was loyal to Manilabank, owned by the Puyats where Lito was the FIBA and BAP president back then.
Hubalde's rise was also attributed to Rudy Soriano's injury of 1976. Crispa's #3 position back then was loaded with Adornado, Soriano and Hubalde that Soriano had to be utilized as #4 at times when Cezar was playing #5, since Guidaben was still gangling back then. Had Soriano been injured-free in 1977, he would have been the logical pick at #3 with Hubalde spelling him. The difference though was Hubalde was more versatile than Soriano as the former not only was adept at slashing the interior but was also a shooting threat from the outside.
Johnny Revilla played for only a couple of conferences with Crispa in the pros before moving to Great Taste Coffee. Revilla was another player that could have been a star had he been with another team. Oldtimers recall that Revilla was such a superstar in UE that he was the Warriors' heir apparent to the Big J. He had his moments with Crispa but since Co was the star shooting guard, Baby Dalupan had no choice but to bench Revilla. Another gem of a talent back with Crispa then was Rey Franco, but never got to relive his glorious amateur days.