Lovell was a member of three AAGPBL Champion Teams and ended her eight-year career with 25 home runs, more than any catcher in the league's history and good enough to rank her 10th in the all-time list. In addition, she was selected to the 1953 All-Star Team. Lovell entered the AAGPBL in 1948 with the Rockford Peaches, winning back-to-back championships with the Peaches 1949-'49 teams. While having played only 52 and 26 games in her first two professional seasons, she became a full-time player after moving to the Kalamazoo Lassies, playing for them in 1950 and 1951. She was traded to the Kenosha Comets for the second half of the 1951 season, but rejoined the Lassies in the summer of 1952, with whom she played the rest of her career, including for the 1954 champion team. In her final season, Lovell said goodbye in a meaningful way when the ball was reduced to Major League size. She posted a.286 batting average with 21 home runs and 69 runs batted in, to reach all career goals. Those 21 longballs served to lead the league in that season, and also accounted for all but four of her 25 career home runs, which ended up being the most by any catcher in the history of the league. That season she was a member of the All-Star Team who faced the Fort Wayne Daisies host team. Lovell played both battery positions, but was a much better receiver, despite been playing with sore knees for a while. In addition, she had an appendectomy that limited her to 55 games during the 1952 season. At age 28, though, her professional career came to an end — as was the case for all of the players in the league — as the curtain came down on the AAGPBL as it folded.
Personal life
Following her playing retirement, Lovell returned to Conneaut and married Harold Dowler in 1959. The couple lived a full, adventurous life together. Both played golf and bowling, raised German Shorthaired Pointer's, and she also rode motorcycles. But in her later years, she was beset by a renal failure, which forced her to dialysis. Eventually, she suffered complications from diabetes. She died in Amboy, Ohio, at the age of 65, and is buried in Waterford Cemetery at Erie County, Pennsylvania.
Author Susan E. Johnson, a sociology professor and devoted fan of the Rockford Peaches, wrote in her 1994 book When Women Played Hardball the next commentary: Jean ordered an arrangement of yellow roses with her catcher’s mitt inside of it, and when they closed the lid of her casket for the final time, her catcher’s mitt went inside with her.