They were part of the major league National Association their first year but were excluded from the newly formed National League 1n 1876. They remained in an independent or minor league through their history.
Below is a photo of the Keokuk team in the 1890's when there name was changed to the Redlegs.

Former major league baseball player and prolific inventor, Harry Decker settled in Keokuk after he was blacklisted by the American Association for breaking his major league contract. He played intermittently with the local club and was considered one of their best players. While in Keokuk, Decker met and married his "child bride" of 15, Anna Burns in 1885. Harry' was eventually reinstated to the American Association and resumed his major league career. However, his erratic behavior and squandering of money led to check forgery and through the 1890's He was in and out of court and jail. Harry was in so much trouble with the law that he could not use his real name for fear of prosecution or liens against him. He had his wife Anna sign for one of his patents in 1895.
Anna Burns Decker of Keokuk was listed the inventor of a catchers mitt in 1895. The patent of Decker was innovative for the method of constructing a catchers mitt out of three replaceable sections, the front face, the perimeter band and the gloved back section. All three sections were joined by lacing instead of the usual stitched seam.
Decker sold her patent to Frank Brogan, Manufacturer of Baseball Goods in nearby Iowa City. This ad below is from a catalog circa 1899. note the lacing through the face of the mitt. The lacing is woven through the padding and around the outside of the perimeter band. Note the big "half-moon" pull tab end to the wrist strap for ease of adjustment and to keep the strap from disengaging from the buckle. Also note the length of the wrist strap, attaching to the outside edge of the sewn on glove. Pretty freakin' cool if you ask me. Note the patent stamping of Dec.10, 1895 on the face of the mitt. The catalog quotes extra pricing for including additional faces, perimeter bands and backs to replace worn out sections.
By the 1940's the "Keokuk Westerns" became a minor league affiliate of major league teams and changed their name to the "Keokuk Kernels". As an affiliate with the Cleveland Indians in 1954, The "Kernels" most distinguished player may have been a young Roger Maris.