Bears top draft pick David Montgomery’s summer break is off to a nice start. The running back taken in the third round officially signed his four-year rookie contract Friday, one day after the completion of the Bears’ offseason program, in which his versatility increasingly was evident.

Montgomery, whom the Bears selected 73rd overall in April’s draft after moving up 14 spots in a trade with the New England Patriots, can earn about $4 million over the life of his slotted rookie contract. The 73rd overall selection a year ago, Miami Dolphins linebacker Jerome Baker, signed a contract totaling $3.8 million with a $975,200 signing bonus, according to spotrac.com.

With Montgomery under contract, only sixth-round pick cornerback Duke Shelley remains unsigned among the Bears’ five-man draft class. That’s surely a welcome change for general manager Ryan Pace and coach Matt Nagy after the 29-day holdout last year by first-round pick linebacker Roquan Smith wiped out the eighth overall pick’s entire training camp and preseason.

Although the Bears are expected to use a committee backfield, Montgomery, the ex-Iowa State All-American who exceeded 1,000 rushing yards and led college football in forced missed tackles each of the past two years, is the favorite to replace former Pro Bowler Jordan Howard, who was traded to the Philadelphia Eagles in March.

“David’s personality is he’s introverted. He’s quiet, but he’s so driven, and you can just see how competitive he is, and he wants to be perfect on every single play,” Nagy said. “So he’s going to practice the way he plays – and he’s making plays. We always knew he had great hands. You don’t know with these college backs how great of route runners they are. But he’s a really good route runner.”

Montgomery’s receiving chops, which the Bears have maintained since his arrival might be a bit underrated, were on full display during Wednesday’s practice. He made a tremendous catch over his head that showed off his natural hands and concentration, and as a receiver, Montgomery threatened every level of the Bears’ starting defense.

“Just the versatility – how versatile it is,” Montgomery said of his biggest impression thus far of Nagy’s offense. “How open it is to different positions, to move in different areas of the field. So that’s really the big thing.”

For Montgomery, who grew up in an impoverished part of Cincinnati and didn’t always know where he’d lay his head or find his next meal, signing his first NFL contract likely feels that much sweeter.

“It’s a comfortable bed,” Montgomery explained earlier this week of his current living situation in the team-issued apartment. “When I grew up, I didn’t have beds a lot of the time. So I’m grateful. I’m good.”

Summer bookkeeping: The other order of business the Bears completed as they began a five-week break before training camp was signing offensive lineman Jordan McCray on Thursday. The 6-foot-3, 320-pound first-year player from Central Florida took ex-Bears kicker Chris Blewitt’s spot on the 90-man roster after participating in the three-day veteran minicamp on a tryout basis.

McCray, 27, originally signed with the Green Bay Packers as a 2014 undrafted free agent and most recently spent time with the Carolina Panthers last offseason. The identical twin of Packers reserve offensive lineman Justin McCray, Jordan McCray joins a crowded competition to earn a backup job on an offensive line that returns all five 2018 starters.