R.J. Hunter is expected to sign a multi-year deal with the Boston Celtics by the end of this week or early next week according to a league source.

The 6-foot-6-inch guard was selected by Boston with the 28th overall pick in last June’s NBA draft.

And as a first-round pick, the first two seasons of Hunter’s contract will be guaranteed.

The NBA rookie salary scale calls for Hunter to make $957,200 as a rookie and $1,000,200 in his second season.

However, the NBA’s collective bargaining agreement allows NBA teams to pay players up to 120 percent of the rookie salary scale which is what they normally do.

That would bring Hunter’s salary for the first two years to $2.35 million - $1.15 million as a rookie and $1.2 million in his second season.

Boston has already signed fellow rookie Jordan Mickey to a four-year, $5 million contract.

Mickey, drafted by the Celtics in the second round as the 33rd overall pick, has a four-year deal with team options for years three and four – similar to the kind of contract Mickey would have received if he were a first-round pick in June.

Boston’s other first round pick Terry Rozier is expected to ink his deal with Boston soon as well.

Hunter joins what is a very crowded backcourt that includes Rozier who was selected with the 16th overall pick.

In addition to Rozier, Boston returns starting guards Marcus Smart and Avery Bradley, along with Isaiah Thomas. In addition, there’s Evan Turner who can play both guard positions as well as some small forward.

After a slow start in Salt Lake City with the Celtics summer league team (averaging six points per game), Hunter became more of a factor offensively when the Celtics move on to the Las Vegas Summer League.

In Las Vegas, Hunter led the team in scoring with a 15.6 points per game average.