Memphis currently has a 21 man roster, but only two centers: Gasol and Doral. That said, center is a dying position in the NBA; so, the fact that Memphis roster only includes two true centers means little about Doral's prospects for making the Grizz. If Doral gets sent to the Grizz G League team, he will play for the Memphis Hustle. They play in Southaven, Mississippi, which is a Memphis suburb.
The NBA has announced the salaries for G League players: $7K a month which translates to $35K for the 5 month season. If the G League player is on a two way contract, meaning the NBA team can send him up and down between the NBA team and the G League team, his salary will be prorated depending on how many days the two player spends on the G-League roster and the NBA roster. G-League two-way players will earn a $77,250 salary if they spend all of their time in the G League and the pro-rated portion of their NBA salary will be based on the rookie minimum of $385K per year. Linkage:
https://gleague.nba.com/news/nba-g-league-announces-player-salaries-2018-2019-season/