Jenny Foy is "a natural diver who gets better all the time," according to her coach at Robinhood Swim Club, Wendy Stembel.

"She's the best diver on the team in the girls 15-18 age group. She hasn't lost this summer," Stembel said.

Foy, 15, who will be a junior at Springbrook High School in the fall, said she dives for the fun of it -- not the glory. "The first year I started diving I might have quit, except I started with a friend, and we had so much fun doing it," she said. "If I didn't have fun, I wouldn't do it.

"If I win, that's great. If I don't, it's no big deal. There's always another meet."

Nevertheless, Foy wins often. She holds all the girls diving records at Robinhood. This past winter, she won the girls' division of a Montgomery County meet of high school divers and placed fourth in a metropolitan area high school competition. The Montgomery County Swim League record for girls 10 and under belongs to Foy.

Each summer, the two best divers in each age group in each division in the league compete in an all-stars meet. Foy finished third in all-stars in her age group in 1980, first in 1981, third in 1982, first in 1983 and second in 1984. She injured her ankle and was unable to compete last summer.

In addition to diving, Foy is co-captain of Springbrook's varsity cheerleading squad. She played junior varsity softball in ninth and 10th grades and will try out for the varsity team next season.

"When I was little I played on an all-boys baseball team with my older brothers, Chris and Mike," Foy said. "I filled in one day when someone was sick, and I guess I did all right -- they kept me on for two years. But when I got older, I had to switch to softball because they wouldn't let me on the guys' team."

Competition has always been a part of the Foy household, although, Foy said, "My parents never push us. I grew up thinking, 'If my brothers can do it, I can do it.' Everything in my house centered around trophies. Whoever had the most trophies was the coolest. My brother Chris said I'd never get a trophy as big as his. When I did, I ran home and showed him it wouldn't even fit in the trophy case."

Foy maintains a healthy attitude toward competition. It hasn't hurt her friendship with Debbie Sprott of the Regency Estates team, with whom she started diving eight years ago. "We're evenly matched. She wins one; I win one," said Foy. "I don't think of it as, 'I'm going to beat her.' I think, 'We'll tie.' We laugh and joke between dives, but then we go out there and do it right."

Fort Washington swimmer Mark Henderson broke an 8-year-old Prince-Mont Swim League record in the 15-18 boys 50-meter backstroke with his time of 29.32 against Hawthorne . . .

Alison Hess, also of the Fort Washington team, set three pool records at Smallwood Village. She touched in at 1:02.63 in the 15-18 girls 100-meter freestyle, 32.66 in the 50-meter backstroke and 1:10.88 in the 100-meter individual medley . . .

Naval Ordinance's Michelle Mazur set a pool record in her team's 100-foot, long course pool with a time of 45.51 in the 13-14 girls 200-foot breaststroke against Oxon Hill. Mazur swam the 200-foot freestyle in 37.60 at home against Forest Pool, setting another pool record . . .

Terri Messenger of Belair Swim and Racquet came away from a meet at Beltsville with three pool records. Messenger, who competes in the 15-18 girls age group, swam the 50-meter butterfly in 32.16, the 100-meter freestyle in 1:03.77 and the 100-meter individual medley in 1:12.02 . . .

Green Acres' Wayne McCool took two pool records in the 13-14 boys category at Bannister. His 50-meter butterfly time was 30.58 seconds; he did the 100-meter individual medley in 1:09.65.