The Astros likely aren't done this offseason.

Speaking with the Houston Chronicle on Saturday, general manager Jeff Luhnow said Houston could still trade for a starting pitcher or sign one in free agency.

The top three spots in the Astros' rotation are likely set with Justin Verlander, Gerrit Cole and Collin McHugh, but the final two spots are up for grabs with Josh James, Framber Valdez and Brad Peacock all likely candidates to be Houston's No. 4 and No. 5 starters. Lance McCullers Jr. is out for the season with Tommy John surgery.

Houston reportedly was interested in signing free-agent right-hander Nathan Eovaldi this offseason, but he ultimately went back to Boston.