This is a single-edition Peter O'Brien with Sweet Caroral 350/30 back. There are 8 other advertising backs that appear with O'Brien which gives this pose 9 unique player/back combinations in the original 1909-11 T206 set.
Peter J. "Pete" O'Brien was a 5'7", 170lb, L/R, second baseman from Binghamton who played 3 years in the majors with four different clubs. A lifetime .223 hitter, O'Brien finished his career having played 249 games with 191 hits, 78 runs batted in, 18 doubles, and 30 stolen bases. He died in 1917 at the age of 39.