 In August 1918 Rogan and the rest of the 25th Infantry were moved to Camp Stephen D. Little in Nogales, Arizona. Researchers John Holway and James Riley report that in 1919, Casey Stengel played against Rogan in Arizona, and subsequently recommended him to Wilkinson for his new Negro National League team, the Kansas City Monarchs. However, Rogan had already played in the California Winter League and for Wilkinson's All-Nations team in 1917, and had already been noted by Negro sports reporters as early as 1916.
