After a standout three-year career at Cal, Daulton Jefferies was selected 37th overall in the 2016 MLB Draft by the Oakland A's. Jefferies' pro debut was delayed slightly as he completed a rehab from a shoulder issue that limited him to 50 innings during his junior year at Cal. Now healthy, Jefferies has made two appearances for the AZL A's, allowing one run on four hits in four innings. He has yet to walk a batter and he has struck-out seven.
Above is video of Jefferies' professional debut, which came on August 8th at Fitch Park in Mesa, AZ.