Updated, 11:14 a.m.

Good morning on this wet Friday.

In the wee hours of Sunday morning, before many of us are awake, 4,000 athletes will leap into the Hudson River for the New York City Triathlon.

Several of them will be Sigelbaums.

Jeffrey Sigelbaum, 57, and his sons Calvin, 27, Malcolm, 25, Doug, 24, and Greg, 22, are all competing.

When we joined the Sigelbaum squad this week for a run on the West Side Highway, the consensus was that Jeffrey, the father whose tenure as a swimmer dates back to his days as a lifeguard in college, would beat his sons in the mile-long swim down the Hudson River. Malcolm is expected to outpace the rest in the 25-mile bike ride on the Henry Hudson Parkway. Doug, who has completed four marathons, should prevail in the roughly six-mile run through Central Park. Calvin, now in his fourth triathlon, said he was aiming for second place in each leg, and Greg — the only Sigelbaum doing the competition for the first time — is the wild card.

“This is going to be our first group race where all five of us are doing it together,” said Calvin, who was the first Sigelbaum to compete in the triathlon, in 2014.