Constance Wisniewski (Wiśniewski) (February 18, 1922 – May 4, 1995) was a starting pitcher and outfielder who played from 1944 through 1952 in the All-American Girls Professional Baseball League.

In addition, she posted a 107-48 career record to become one of only seven pitchers to collect 100 or more victories in AAGPBL history, ranking behind Helen Nicol (163), Jean Faut (140), Joanne Winter (133), Dorothy Collins (117), Maxine Kline (116) and Nancy Warren (114).

As a hitter, she ranks fifth in the all-time list with a .290 average, behind Joanne Weaver (.359), Betty Foss (.342), Jean Geissinger (.306) and Dorothy Kamenshek (.292).

She began playing against the greatest semi-professional softball players of Detroit in the late 1930s, and led the Hudson Motors team to the city championship.

She quickly learned fundamentals of the position, acquiring good mechanics, location and speed, the only way to pitch consistently with the minimum effort.

[4][6] By the time Wisniewski was nineteen years old she was pitching for the Detroit Keller Girls, a team who gained attention during the early days of World War II, which earned her a solid prestige and consideration in national softball circles.

Wisniewski possessed a blazing fastball thrown with a windmill-like underhand pitching motion and speeds in the 90 miles per hour range.

[4][7] * 1944 season In 1944 Wisniewski joined the Milwaukee Chicks, a well-balanced squad that counted with talented players as Thelma Eisen, Merle Keagle, Betty Whiting and Alma Ziegler.

The best offensive support came from Keagle, who hit .264 with 47 RBI, led the league with 145 total bases, and set a new single-season record with seven home runs.

In her rookie season Wisniewski posted a 23-10 record for a .697 winning percentage and collected a 2.23 earned run average (7th in the league), while striking out 49 batters and walking 47 in 36 pitching appearances.

In fact, the Chicks were forced to play all seven games of the series at Kenosha's Lake Front Stadium because the Brewers were using the Borchert Field in Milwaukee.

Due to lack of community support and skepticism of journalists, the Chicks moved to Grand Rapids, Michigan prior to the 1945 season.

[10] * 1945 season In 1945 Wisniewski became known as the Polish Rifle, in part due to her ethnic origins, and Iron Woman by her hard throwing pitches and endurance at the mound.

Wisniewski also broke her own all-time mark of victories, sharing the league lead with Joanne Winter (33-10), to set a record of 33 single-season wins that never would be matched again by any pitcher.

She began to appear more regularly at right field, because Grand Rapids manager Johnny Rawlings decided to take advantage of her strong throwing arm and not waste her talent as a hitter.

After a 65-47 record and another second-place finish, the Chicks defeated the South Bend Blue Sox in the first round of the playoffs, three to two games, and clinched the Championship Title over Racine through seven contests.

Mildred Earp, who posted a 20-8 record with 192 strikeouts and a 0.68 ERA in the regular season, hurled a four-hit, 1–0 shutout in decisive Game 7 en route for the title.

In 105 games, she hit a .326 average with a .401 on-base percentage, slugged .412, and finished third in the batting race behind Betty Foss (.368) and Dorothy Kamenshek (.345).

[18] Connie Wisniewski is part of the AAGPBL permanent display at the Baseball Hall of Fame and Museum at Cooperstown, New York, opened in 1988, which is dedicated to the entire league rather than any individual player.