After winning the Home Run Derby, stroking more homers than any other rookie in major league history and still missing the playoffs, Pete Alonso, the Met known to fans as Polar Bear, retreated from the city into hibernation in October.

One of his first stops was Yellowstone National Park. He pitched a tent and camped with his fiancée, Haley Walsh, before going home to Florida, where he went fishing. Last week, he packed his rifle and flew to Colorado, where he went on a dream hunt. His mother, Michelle Alonso, recognized his need to recharge.

“He went off the grid, back to nature,” she said. “Mentally, he’s back.”

Alonso re-emerged Monday night, when Major League Baseball announced that he had won the National League Rookie of the Year Award. Alonso, 24, became the sixth Met to be named the top rookie in his class, joining his teammate Jacob deGrom, who won in 2014, Tom Seaver (1967), Jon Matlack (1972), Darryl Strawberry (1983) and Dwight Gooden (1984).

The Baseball Writers’ Association of America announced that Alonso had received 29 of 30 first place votes for the award, with Mike Soroka of the Atlanta Braves receiving the lone holdout. Soroka finished in second place, while Fernando Tatis Jr. of the San Diego Padres finished third.