Buehler was promoted to Double-A Tulsa on Tuesday, J.P. Hoornstra of the Los Angeles Daily News reports.
The 2015 first-round draft pick out of Vanderbilt has been outstanding in his first few starts with High-A Rancho Cucamonga, posting a 1.10 ERA and 27 strikeouts in 16.1 innings of work. Buehler will look to carry this success into his time with the Drillers, where he'll slot into their rotation immediately. His innings will likely continue to be monitored given how recently he underwent Tommy John surgery, but he appears to be on a relatively fast track to The Show.