Career
Blankenship played his entire career with the Oakland Athletics (1988–1993) after the A"s drafted him in the 10th round of the 1986 MLB amateur draft. He made his Major League Baseball debut on September 4, 1988, and played his final game on August 15, 1993. His career concluded with a regular season.222 batting average, 9 home runs, 92 runs batted in, and 54 stolen bases.
Blankenship played for the Athletics in two World Series.
In 5 postseason series, Blankenship tallied a career postseason.250 batting average with 4 runs scored and 2 stolen bases.