Two-time All-Star big man Jaren Jackson Jr. is on the verge of agreeing to a five-year, $240 million deal with the Memphis Grizzlies, ESPN reported on Monday.The final season of the deal in 2029-30 is a player option, according to the report.Memphis also agreed to a three-year, $52.5 million deal to retain Santi Aldama, who was slated to become a restricted free agent.Jackson, 25, was the NBA Defensive Player of the Year for the 2022-23 season. He was an All-Star that season and again last season.Jackson averaged 22.2 points per game last season, slightly behind the career-best 22.5 he put up one season earlier. He is averaging 18.5 points in 407 games (398 starts) over seven seasons in Memphis.Jackson also has career averages of 5.5 rebounds, 1.9 blocked shots, 1.5 assists and 1.0 steal per game.