Both will have to pass fitness tests at training on Thursday but they are on track to play at this stage.
However young defender Tom McDonald is likely to miss a further two weeks with a shoulder injury incurred at training last Thursday.
The injury forced McDonald to be a late withdrawal against Gold Coast.
And co-captain Jack Trengove is likely to miss another week after a calf injury flared during training last week.
He had reported soreness following the game against Carlton, did not recover as quickly as he hoped and was unable to complete training last Thursday.
"It's not a lot but it's whether we hold him back for another week or not," Melbourne's elite performance manager Dave Misson told melbournefc.com.au.
Misson confirmed to the club's website that providing Watts and Jamar trained well on Thursday, they would be available for selection.
The experience of Jamar and class of Watts will be welcome after Colin Sylvia received a three-week suspension for striking the Suns' Jared Brennan.
Misson said that key forward Mitch Clark was due to return on Wednesday from a short post-surgery break with family in Perth.
Clark would be out of the moon boot soon and likely to be back running in a couple of weeks.
Jack Grimes was in a sling in the rooms post-game on Sunday after breaking his collarbone the week before against Carlton. He will visit his surgeon on Wednesday and Misson hopes he will be out of the sling before the end of next week.
The Demons will be under enormous scrutiny against the Tigers after another sub-par performance against the Suns.
