Jeff Gross, Former 888 Sponsored Pro and Twitch Star, Signs with PokerStars Sponsored by 888 last WSOP, one of Twitch Poker’s hottest properties signs onto the Team PokerStars Online roster. Share: Former 888 sponsored pro Jeff Gross has joined the ranks of PokerStars’ illustrious Team PokerStars Online roster. Continue reading on Poker Industry PRO » Poker Industry PRO: Exclusive Article This article is exclusive to Poker Industry PRO subscribers. Already a subscriber?» Read the full story. Not a subscriber yet? » Find out more and start your subscription today to get instant access.