Tim MacMahon, ESPN Staff WriterOct 2, 2024, 03:54 PM ETCloseJoined ESPNDallas.com in September 2009Covers the Dallas Cowboys and Dallas MavericksAppears regularly on ESPN Dallas 103.3 FMNASHVILLE, Tenn. — An MRI on Memphis Grizzlies power forward/center Jaren Jackson Jr.’s hamstring revealed a low-grade strain, coach Taylor Jenkins said.Jenkins categorized the MRI results as “good news” after Wednesday’s practice. Jackson, the 2022-23 Defensive Player of the Year, exited the first practice of training camp early on Tuesday after feeling tightness in his hamstring.Editor’s Picks1 Related”We’re going to be cautious throughout preseason, so not a firm timeline, but very good news,” Jenkins said, adding that there are “no concerns” about whether Jackson will be ready for the regular-season opener.The Grizzlies, who were ravaged by injuries during a 27-55 campaign last season, entered camp with two rotation players sidelined for extended periods.GG Jackson, a second-team All-Rookie selection last season, had surgery on Aug. 30 to repair a broken fifth metatarsal in his right foot. He will miss at least the first two months of the regular season.Wing Vince Williams Jr., one of Memphis’ best defenders, has a stress reaction in the upper portion of his left tibia. He will be reevaluated around the start of the regular season.