It will not. ESPN3 requires an ESPN cable subscription, which is different from ESPN+. Sign up for a FUBO.tv 7 day trial, that will cover it. Alternatively, go to the watch section of ESPN's website and select something that is a replay from ESPN3 and when it asks you to sign in, use your internet log in. Some ISPs like Midco grant ESPN3 access. There might be a stream linked on here too.