Complex sentence: Born in Eagle Pass, Texas, Mackey began playing baseball with his brothers Ray and Ernest on the Luling Oilers, a Prairie League team, in 1916 in his hometown of Luling, and joined the professional San Antonio Black Aces two years later.
Split into simpler sentences: Born in Eagle Pass, Texas, Mackey began playing baseball with his brothers Ray and Ernest on the Luling Oilers, a Prairie League team, in 1916 in his hometown of Luling. He joined the professional San Antonio Black Aces two years later.