Dallas guard Devin Harris missed the second half of the Mavericks' game against the Portland Trail Blazers on Tuesday night after spraining his right thumb.

Harris was hurt when he blocked a dunk attempt by Portland's Ruben Patterson with 8:51 left in the second quarter and did not return.

Harris, who finished with two points and two blocked shots in 4 minutes, had X-rays that were negative and will be further evaluated on Wednesday.