The two teams share the same practice field almost daily.
Both head coaches, who are alums of the school, frequently bounce ideas off one another.
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The players from both squads always support and interact with one another before and after games.
Like programs at other schools, Adelphi's men's and women's lacrosse teams are close, yet they share an exclusive similarity this season: Both are perfect.
Adelphi is the nation's only university with both its men's and women's lacrosse teams undefeated. The women are 12-0 and the men set a program record Tuesday night with their 11th straight win.
"At times we feel like we're one team," men's coach Gordon Purdie said. "We just have a common thread of loving Adelphi lacrosse. To see it having so much success in both the men's program and women's program, it's really very exciting."
Nick Watson has 35 goals and 16 assists and Salvatore Tuttle (Farmingdale High School) has 31 goals and 16 assists to lead the men, but the team also has six other players who have racked up double figures in points.
"This is the most depth we've had here," Purdie said. "There is so much competition during practice, with people fighting for playing time at every position."
A constant for Purdie's crew has been at the faceoff. Gregory Puskuldjian (North Shore) has won an impressive 167 of 235 faceoffs and his 8.9 ground balls per game is tops in Division II.
"Greg is winning more faceoffs than anyone in the country and he might set the school record for most ground balls if he keeps playing like this," Purdie said.
After defeating Le Moyne -- which knocked Adelphi out of the Northeast 10 tourney and NCAA Tournament in 2013 -- last week, the men became No. 1 in the United States Intercollegiate Lacrosse Association Division II. With four games left in the regular season, they will host Saint Michael's College at 1 p.m. Saturday.
The women remain ranked second after handing New Haven its first loss, 13-5, Tuesday night.
"We were waiting for that game all year," women's coach Rob Grella said.
The squad, which has been successful controlling the clock and cashing in after long possessions, will visit Assumption College at 1 p.m. Sunday. The matchup is one of five remaining in the regular season.
The women's team, a perennial powerhouse with five national titles, has been led offensively by mainstays Devan Crimi (78 points), Alexa Froccaro (62) and Rachel O'Brien (42). Jackie Jahelka, a freshman and Garden City graduate, has emerged with 35 goals.
"We knew that we were getting a good player," Grella said. "She came from a great program and she has just taken it to Adelphi. She wants to win every day."
And so far both Adelphi teams have.
"Yeah, and, of course, we'd love for it to continue," Grella said with a laugh. "But as far as pressure goes, we changed something this year in our approach that has worked. Our scouting report the last couple of years focused on other teams. We spent all this time preparing for other teams and we got away from what we do best. I realized the only team that could beat us is us."
The same might be true for the men.