The Rockets let the clock run out on their option to keep small forward James Posey on Friday, choosing to let him jump to the Grizzlies rather than match Memphis' four-year, $24 million offer.

No announcements were made. But the Rockets allowed Friday's 5 p.m. deadline to pass without matching the offer sheet.

The Rockets signed small forward Adrian Griffin on Thursday and guard/small forward Eric Piatkowski less than a week after Posey, a restricted free agent, signed his offer sheet.

Posey, 26, averaged 9.3 points and 4.8 rebounds in 58 games with the Rockets last season, hitting 43.9 percent of his field-goal attempts.

The addition of Griffin and Piatkowski to forwards Glen Rice and Bostjan Nachbar left little incentive for the Rockets to retain Posey at that price, particularly with the Rockets' payroll next season expected to trigger a luxury tax.

Rockets general manager Carroll Dawson said he considered Griffin and Piatkowski valuable additions to the Rockets' roster, rather than replacements for Posey, but said he was happy with the changes.