Ryan Garcia threatens to quit boxing in since-deleted posts after test results come back positive for PEDs

Embattled boxer Ryan Garcia's drug test samples collected before his fight against Devin Haney returned two positive tests for banned performance-enhancing drugs, according to boxing writer Dan Rafael. 

"Ryan Garcia’s B sample results were returned Thursday a.m., 1 day after being opened," Rafael tweeted. "I have the lab reports & the B samples, as expected, matched A samples – both are positive for the banned PED Ostarine related to VADA tests the day before & after Haney fight."

Garcia caught wind of the results and...