Lelie is the fourth Oakland receiver placed on the season-ending injured reserve list this year, joining Javon Walker (ankle), Drew Carter (knee) and rookie Arman Shields (knee).
Lelie was signed just before the start of the season after Carter injured a knee in an exhibition game. He had 11 catches for 197 yards and two touchdowns before injuring his calf last week against New England.
With Ronald Curry doubtful this week with a turf toe injury, the Raiders (3-11) could have no active wide receiver with more than 20 career catches for Sunday's game against Houston.
Second-year receiver Johnnie Lee Higgins (19 career catches) is expected to start alongside rookie Chaz Schilens (nine catches). Todd Watkins and Jonathan Holland, neither having a career reception, would be the backups.
Strong is an undrafted free agent out of Pittsburgh who has spent the whole season on the practice squad.
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