The Celtics made a strong push to add some bulk to their roster already after the trade deadline, but ultimately did not succeed in their quest to land free agent center Andre Drummond before he opted to sign with the Los Angeles Lakers. A few other notable names (LaMarcus Aldridge, Gorgui Dieng, Austin Rivers) have reportedly found homes with new teams over the weekend, thinning out the crop of talent available on the buyout market. However, there are some names across the league that are rumored to potentially hit the open market in the coming days. Which players might become available? And what are the odds of the Celtics landing someone who might make an impact? Let’s break down some of the possibilities, starting with players still under contract.Will they be bought out?Kelly Olynyk: The former Celtics big man was sent packing to Houston at the trade deadline to allow for the Heat to acquire Victor Oladipo. He scored 16 points for Houston over the weekend while suiting up and starting so opportunity will be there for Olynyk to put up some empty stats in big minutes there for the remainder of the year on an awful team. However, Olynyk could push for an exit elsewhere if he senses a meaningful opportunity elsewhere. Giving up his Bird Rights with Houston won’t be great for his next contract but that won’t mean anything if the Rockets aren’t interested in retaining him anyway this summer. He had an up-and-down year in Miami (shooting a surprisingly low 32 percent from 3) but would certainly be a nice stretch option as depth for Boston or some other contender. Whether he prefers that smaller role and a chance at competing in the playoffs over consistent minutes for a bad team is the question.Wayne Ellington: A surprising player that didn’t move at the trade deadline for a bad Pistons team. He’s had a terrific bounce-back year at age 33 (43 percent from 3), earning him a spot in Detroit’s starting five. Past indications have shown that Ellington values opportunity playing (he chose more playing time in Detroit over serving as bench depth on a contender after being bought out in 2019) so he’s probably not going to shake free here. Even if he does, the addition of Evan Fournier combined with the impending return of Romeo Langford doesn’t make Boston a top candidate to land him. The Celtics might want those minutes to go to Aaron Nesmith anywayCory Joseph: Another veteran who was dumped to Detroit at the trade deadline. He only has a very small guaranteed amount on his deal (about $2 million) for next season, making a buyout very realistic if the Pistons opt to play their young guys over him as the year progresses (he’s gotten solid minutes so far in two games). Boston’s trade of Jeff Teague away for nothing would signal that adding any veteran in the backcourt probably isn’t happening in order to ensure Payton Pritchard and Boston’s other young guards get playing time. However, Joseph is a solid defender with decent size for a point guard (6-foot-3), something that the C’s reserve guards lack. The guess here is he finds a more appealing possibility than Boston if he hits the open market.Otto Porter Jr.: The former Bull made his debut for Orlando on Sunday night, playing 25 minutes off the bench. He was salary filler in the Nikola Vucevic deal with Chicago but would quickly become one of the hottest free agents if cut loose thanks to his 40 percent career mark from 3-point range and ability to guard small forwards and power forwards at 6-foot-8. At age 27, the Magic may be interested in retaining him after this season and holding his Bird Rights would be an advantage on that front. However, if Porter Jr. is willing to forego a few million in his $27 million salary this year to go play for a contender, that may be enough for the Magic to cut him loose with the prospect of young forwards like Chuma Okeke and Jonathan Isaac likely taking up the lion’s share of minutes next year on a rebuilding squad. The Celtics could certainly use Porter Jr. if he hits the market but I would expect them to be pretty long down the list of playoff teams that wanted him, making him a long shot target.Avery Bradley: The Rockets got nothing for Oladipo outside of him, a pick swap (probably useless) and Kelly Olynyk’s expiring deal so it feels extremely unlikely for him to be cut loose unless he makes a stink about it. Bradley is only making $5.6 million this year and his $5.9 million team option for next season could be a useful trade chip for the Rockets in the offseason. If they cut Bradley and Olynyk loose, they pretty much gave away Oladipo for nothing but the financial savings on Oladipo’s deal so the guess here is at least one of them stays put. Bradley’s contract situation makes him the better bet.Mike Muscala: Arguably, the most likely candidate on this list to be let go, assuming he has a new deal lined up for himself elsewhere. Muscala has been a reliable stretch big for the Thunder this year (37 percent from 3, career-high 9.7 ppg) but he hasn’t played in over a week with a right ankle sprain. With OKC moving in a younger direction by benching Al Horford for the remainder of the season (he won’t be bought out BTW), the 29-year-old Muscala’s agent will probably be on the lookout for a spot elsewhere instead of riding the pine in Oklahoma City. How much he could help a team like Boston is debatable (certainly not a reliable option for a postseason series) but he does add a stretch perimeter element that the Celtics could use as an option situationally with Theis out the door. Whether or not he’s a better fit in that role than Luke Kornet will likely determine Boston’s interest but Kornet obviously did a lot to help his cause on that front in the short-term against the Thunder on Saturday night.Current Free AgentDeMarcus Cousins: The former Rockets big man has been quietly available for months but waiting on the trade deadline and buyout market to play out has surely limited teams willing to give him a look to this point. With Boston’s top targets on the free agent market going elsewhere, would taking a flier on Cousins as some added depth and bulk in the middle make sense? His production in Houston this year was very underwhelming over 25 games (career-low 37 percent shooting, 33 percent from 3) and his physical limitations are very real after an injury plagued past two seasons.