Onuaku (nose) is listed as out for Thursday's game against the Timberwolves.
Onuaku underwent sinus surgery earlier this month and apparently hasn't been cleared for contact yet. The Rockets have been a bit shorthanded in the frontcourt of late, but with Nene Hilario (knee) and Zhou Qi (elbow) listed as questionable for Thursday and therefore seemingly further along in their respective recoveries than Onuaku, it's unlikely the second-year center will pick up minutes off the bench once he's available again.
Nelson was recalled from AHL Rochester on Wednesday.
With Nathan Beaulieu dealing with an illness, the Sabres called in reinforcements on the blue line by promoting Nelson. The 25-year-old has notched 11 points in 37 games with the Americans this season and would be making his 2017-18 debut, if he slots into the lineup against the Rangers on Thursday.
Jordan had one tackle in Sunday's 29-24 divisional-round defeat to the Vikings.
Jordan finished the season with a dud but the box score did not do his performance justice, as the defensive end was constantly putting pressure on Vikings quarterback Case Keenum, particularly in the game's second half. Nevertheless, Jordan's 2017 regular season was an unqualified success. In his seventh season, Jordan had 14 sacks -- tied for fourth-most in the NFL -- and 62 total tackles, which was the seventh-most among NFL defensive linemen. The former Cal product also had 12 passes defensed, an interception, two fumble recoveries and a touchdown. Jordan was selected for the Pro Bowl for the third time in his career, named a first-team All Pro for the first time and should even receive consideration for the NFL Defensive Player of the Year award. At just 28 years old, Jordan is still in his prime and as a result of his versatile production, he should be one of the first defensive linemen off the board in IDP drafts next season.
Based on the team's announcement, Beaulieu likely won't be in attendance at practice Wednesday, which raises questions about his availability heading into Thursday's clash with the Rangers. If the defenseman is unable to give it a go, Buffalo will need to either activate Victor Antipin (illness) off injured reserve or utilize recently recalled Casey Nelson on the blue line.
Dea was called up from AHL Wilkes-Barre/Scranton on Wednesday.
Dea's promotion likely means Bryan Rust (upper body) will remain out of the lineup ahead of the team's three-game California road trip. The 23-year-old Dea leads the Baby Pens with nine goals and 14 helpers. As a natural center, the QMJHL product could allow coach Mike Sullivan to move Jake Guentzel back to the wing alongside Sidney Crosby or Evgeni Malkin.