ESPN article by TJ Quinn on Tyler Skaggs mentions that Garrett Richards made numerous Venmo payments the the accused dealer who allegedly provided the opioids to Skaggs.
https://www.espn.com/mlb/story/_/id/33291935/drug-dealer-testifies-stage-set-matt-harvey-take-stand-trial-former-los-angeles-angels-staffer-eric-kay
https://www.espn.com/mlb/story/_/id/33291935/drug-dealer-testifies-stage-set-matt-harvey-take-stand-trial-former-los-angeles-angels-staffer-eric-kay