Alvin Lawrence "Moose" Wistert (June 26, 1916 – October 3, 2005) was an American football offensive tackle. He played college football for the Boston University Terriers in 1946 and for the Michigan Wolverines from 1947 to 1949. He began his collegiate football career at age 30 following 12 years of working in a factory and serving in the United States Marine Corps during World War II. He played at the defensive tackle position for the undefeated 1947 and 1948 Michigan Wolverines football teams, both of which finished the season ranked No. 1 in the final Associated Press poll. He was the oldest college football player selected as a College Football All-American, having been selected to the 1948 College Football All-America Team at age 32 and the 1949 team at age 33.

He was the last of the three Wistert brothers—along with older brother Whitey and younger brother Albert—to play for the Michigan Wolverines football team. All three Wistert brothers played at the tackle position, were selected as consensus All-Americans, and were later inducted into the College Football Hall of Fame. Alvin was the last of the three brothers to be inducted into the College Football Hall of Fame, receiving the honor in 1973. The Wistert brothers all wore jersey No. 11 at Michigan and are among the seven players who have had their numbers retired by the Michigan Wolverines football program. Their number will be put back into circulation starting on November 10, 2012, before a Michigan home game against the Northwestern Wildcats as part of the Michigan Football Legend program. The Legends program was discontinued in July 2015, and the numbers again permanently retired.

Wistert was born in 1916 in Chicago, Illinois. His parents, Kazimir J. Wistert and Josephine (Shukis) Wistert, immigrated to the United States from Lithuania in 1894 and were married at Chicago in 1907. His father was a policeman in Chicago from at least 1910 to 1927. At the time of the 1920 United States census, Wistert's family lived at 5647 Waveland Avenue in Chicago's 27th Ward and consisted of parents, Kazimir and Josephine, and five children: Josephine (age 11), Isabelle (age 10), Francis (age 7), Evelyn (age 6), and Alvin (age 3-1/2).

Wistert's father was shot while on duty and pursuing a robbery suspect in July 1926. By the spring of 1927, Wistert's father, who had served in the U.S. Army from 1898 to 1901, was disabled due to "chest emphysema with draining sinus" and was admitted to the U.S. National Home for Disabled Volunteer Soldiers in Milwaukee, Wisconsin. He died in June 1927 when Alvin was 10 years old.

Wistert's mother, Josephine, used money from her husband's war pension and the Policemen's Benefit Association to keep the family together and to educate her six children. At the time of the 1930 United States census, Wistert's family continued to live at 5647 Waveland Avenue in Chicago. The household at that time consisted of Wistert's mother, Josephine, and five children: Josephine (age 22, employed as a bookkeeper), Francis (age 18, employed as a tube maker for a radio company), Evelyn (age 16, employed as a "saleslady" at a variety store), Alvin (age 13), and Albert (age 8).

Wistert attended Carl Schurz High School in Chicago, but dropped out. He did not play football in high school. After leaving high school, Wistert worked in a factory for several years. With the income from his factory job, he helped pay for his younger brother, Albert, to attend the University of Michigan. His mother later recalled, "He told me he'd stay out of school for a few years and work so Albert, the baby boy of the family, could go on to school."

In 1940, he enlisted in the United States Marine Corps, spending four years overseas during World War II. Wistert later recalled that he was often confused with his brother Al Wistert who played both college and professional football. In 1982, he told an interviewer that an officer approached him in 1944, "shook my hand and said 'I saw you play in Philly and at Michigan.'" When Wistert explained that it was his younger brother Albert who had played football, the officer "wiped off his handshake, turned on his heels and walked away." According to Wistert, "that so affronted me that I wrote my kid brother and said I'm going to try to get back to school."

After his discharge from the Marine Corps, Wistert worked for Procter & Gamble Soap Company in Massachusetts. He learned that Boston University was offering high school equivalency tests that would allow him to enroll there. Using the post-war G.I. Bill, Wistert spent one semester at Boston University and played for the school's football team as a 30-year-old freshman.