Kyrie Irving (likely to Brooklyn), Al Horford (signing with the 76ers) and Terry Rozier (off to Charlotte) are on the way out, and Kemba Walker is on the way in.

Free agent Kemba Walker is expected to sign a four-year, $141-million deal with the Celtics.

Also, Boston may be interested in trading with Houston for center Clint Capela.

With Kyrie Irving and Al Horford likely on the way out, Smart knows he’ll be looked to as the senior Celtic.

The center would fill a big need and is coming off a career year with the Magic, but there are some reasons for concern.

It’s hard to fathom what the team’s president of basketball operations has in mind as the NBA’s free-agency period approaches.

Langford, 19, is a 6-foot-6 shooting guard from Indiana who hasn’t watched many NBA games recently because he didn’t have cable in college.

Re-signing Kyrie Irving was key to the team’s plans, which seem to be quickly falling apart.

The Boston Herald says Al Horford is no longer discussing a new deal with the Celtics and expects to sign a four-year deal with another team.

With Anthony Davis headed to L.A. and Kyrie Irving ready to cash in on free agency, Jaylen Brown and Jayson Tatum hold the keys to Boston’s success.