April 18, 2017 Derek O'Hara Derek O'Hara, Minor League, Scouting Report Daulton Jefferies: RHP, Oakland A's (Hi-A) April 18, 2017 Derek O'Hara Derek O'Hara, Minor League, Scouting Report Daulton Jefferies is a confident, aggressive strike thrower seen in Hi-A Stockton.
