Grimes put up seven points (3-6 FG, 1-3 3Pt), six rebounds and two assists over 16 minutes during Wednesday's 119-99 win over Chicago.
Grimes ended with nine points (3-5 FG, 3-5 3Pt), one rebound and one steal across 12 minutes during Tuesday's 120-114 win over Minnesota.
Grimes is in the starting lineup for Thursday's preseason game against the Bucks.
Grimes finished with 20 points (7-11 FG, 3-7 3PT, 3-3 FT), four rebounds, two assists and one block in 22 minutes during Monday's preseason loss to the Clippers.
Grimes is not in the starting lineup for Thursday's preseason game against the Jazz, Grant Afseth of DallasHoopsJournal.com reports.
Grimes (knee) said Monday that he is "definitely 100 percent" ahead of Dallas' Fall training camp, Grant Afseth of SI.com reports.
Grimes (knee) was traded from the Pistons to the Mavericks on Friday in exchange for Tim Hardaway and three second-round picks, Adrian Wojnarowski of ESPN reports.
Grimes (knee) has been ruled out for Friday's game against the Wizards.
Grimes (knee) has been ruled out for Wednesday's game against Minnesota.
Grimes (knee) has been ruled out for Monday's game against the Knicks.