Donald Andrew Moog (/moʊɡ/; born February 18, 1960) is a Canadian former professional ice hockey goaltender. Moog played in the National Hockey League (NHL) for the Edmonton Oilers, Boston Bruins, Dallas Stars and Montreal Canadiens, and also for the Canadian national team. Moog is a three-time Stanley Cup champion: 1984, 1985 and 1987. He earned the William M. Jennings Trophy in the 1989–90 NHL season for fewest total goals against the team during the regular season, sharing the trophy with his goaltending partner, Réjean Lemelin.

Moog spent the 2009–10 season as an assistant coach for the Dallas Stars.

After playing minor hockey in Penticton, Andy Moog advanced to the junior ranks, first in the B.C. Junior Hockey League, and then on to the Billings Bighorns of the Western Hockey League (WHL), where he was named a WHL all star in 1979–80. Moog's talents caught the eye of the NHL's Edmonton Oilers, who made Moog their sixth pick – 132nd overall – in the 1980 NHL entry draft.

Moog was drafted by the Edmonton Oilers on June 11, 1980, and spent most of the season in the minors, until injuries to goaltenders Ron Low and Eddie Mio forced him into action late in the season. That year he was spectacular in a three-game first round sweep of the Montreal Canadiens. The following year, Moog was expected to share goaltending duties with Low, but then a 19-year-old Grant Fuhr surprisingly made the team straight out of training camp. Moog was once again relegated to the minors, appearing in only eight NHL games that season.

In 1982–83, Oilers general manager and coach Glen Sather decided to go with the young duo of Moog and Fuhr and traded Low. Moog who played 50 games in the regular season gathering a impressive 33-8-7 record was given the starting job in the playoffs, and helped lead the Oilers to their first Stanley Cup Finals, though they were swept by the New York Islanders, who captured their fourth straight Stanley Cup. The next year Moog played in a back up role only playing in 38 games but would once again boast a winning record but Sather chose to go with Fuhr in the 1984 playoffs. However Fuhr was injured in the third game of the Stanley Cup Finals in a rematch against the Islanders. Moog stepped in and led the Oilers to a series win. Moog would win a second Stanley Cup in a back up role the following 1984-85 season.

During the 1985-86 and 1986-87 seasons Moog and Fuhr continued to nearly evenly split the goaltending duties, with Moog playing just 1 game more than Fuhr in 1986 and 2 more than his teammate in 1987. Moog played well both seasons, boasting a heavy winning record both years. However, when it came to the postseason, Fuhr was the one to get the nod as the Oilers won the Stanley Cup once again in 1987. After demanding a trade, Moog walked out on the Oilers in 1987 to play for Team Canada at the Calgary Winter Olympics. There, Moog and Sean Burke played four games each, with Canada finishing fourth. Overall Moog played 31 career games for Team Canada. Glen Sather offered to trade Moog to the Pittsburgh Penguins for Steve Guenette and a first round draft pick, but Penguins owner Edward J. DeBartolo, Sr. told his general manager, Eddie Johnston, that he could not trade a first round draft pick.

At the trading deadline of the 1987–88 season, Moog was dealt to the Boston Bruins for Bill Ranford, Geoff Courtnall, and a 2nd Round Draft pick (39th Overall) in the 1988 NHL entry draft (RW - Petro Koivunen (1970 - )) on March 8, 1988, shortly after the 1988 Winter Olympics in Calgary. The Bruins implemented a goalie tandem, with Moog and Réjean Lemelin sharing starting duties. Lemelin was in goal for most of the action during the team's run to the Stanley Cup Finals in 1988, as Boston was swept by the Oilers in four games — Edmonton's fourth Cup title in five years. Moog was in goal for the series' final game. During the 1989-90 season the duo would have a dominant season resulting in winning the William M. Jennings Trophy for allowing the fewest number of goals. Despite Lemelin initially starting in net during the 1990 playoffs, after the Bruins had won the Presidents' Trophy for having the best regular season record in the NHL, Moog eventually took over the starting position. After a few games and performing heroics, Moog's team went all of the way to the 1990 Stanley Cup Finals.

A highlight for Moog in the 1990 NHL playoffs was the first round against the Hartford Whalers. With Hartford leading two games to one and leading in game four by a 5–2 score entering the third period, Moog replaced Lemelin in goal and shut out the Whalers for the remainder of the game. The Bruins rallied for a comeback by scoring four goals in the third period. In the 1990 Stanley Cup Finals, the Bruins lost in five games to Moog's old team, Edmonton, who were backstopped by Ranford.