The 36-year-old Texan challenged Joshua for the IBF heavyweight title in December 2016, suffering a third-round loss, and has since tested positive for dexamethasone.
Browsing: Eric Molina
The challenger was a little more positive in the second, but Joshua patiently took his time and caught Molina with a good left hook towards the end of another tentative round
Should he prevail, Joshua will be set to face former world champion Wladimir Klitschko in a 2017 mega-fight and he must therefore ensure nothing upsets those plans against American Molina
The British Olympic gold medallist will defend the belt for a second time following his seventh-round stoppage win over Dominic Breazeale in June