For the third time in 2015-16, the Bruins have dropped three games in a row. This latest losing streak might sting a little more, however.

With three chances to jump to first place in the Atlantic Division and perhaps create some distance between themselves and the other seven teams, the Black and Gold failed in each attempt. Their latest setback came on Sunday as the Bruins fell 3-1 to the Senators in Ottawa. The two teams will conclude the home and home on Tuesday, just three days before the Winter Classic.

Here are a few things we learned from the B’s loss to the Sens.

Injuries to Krug and Krejci come at inopportune time

Last night, Torey Krug left the game in the first period after suffering an apparent lower body injury. He did not travel with the team to Ottawa and he will be reevaluated in Boston.

Less than 24 hours later, bad news turned even worse on the injury front when David Krejci left the game in the second period with an upper body injury. That left Ryan Spooner slotting at center with Loui Eriksson and Matt Beleskey in the third as the B’s were left with 11 forwards for the last 20 minutes.

Injuries are bound to happen in an 82-game season, and to this point, the Bruins haven’t been too hard with the injury bug to their core players. That has changed in a span of less than 48 hours and could really leave them in a hole if Krug and Krejci are to miss any significant amount of time.

Krejci and Krug are instrumental in getting the power play to the top of the league. Losing those two — who have a combined 18 points on the man advantage — on the first PP unit will really be a tall task to overcome for head coach Claude Julien and company.

Asked Sweeney if he was contemplating bringing Pastrnak back from Finland and he said he will discuss it with the coaching staff tonight

— steve conroy (@conroyherald) December 28, 2015

Will Sweeney rescind his decision regarding Pastrnak?

The NHL’s holiday roster freeze ends at 12:01 a.m. eastern time on Monday morning. General Manager Don Sweeney would use that time to announce that, barring any injuries to Bruins forwards, David Pastrnak would be loaned to the Czech Republic for the World Junior Championships in Finland.

Well, Sweeney might have some second thoughts with Krejci’s injury and Pastrnak’s services might be needed sooner. The 2014 first round pick, who suffered a foot injury in October, spent two games in Providence on a conditioning assignment and tallied one assist last week.

Of course, Pastrnak will need some time to shake off some rust, but this provides Sweeney with a short term option. The Bruins GM could also call someone up from Providence, including Austin Czarnik, who has sparked the P-Bruins during their December hot streak.

Penalty kill streak snapped at 26 as Bruins can’t generate power plays

Following the 5-4 loss to the Sharks where they allowed a pair of power play tallies on November 17th, the Bruins penalty kill has been stellar. Entering tonight’s game, the PK carried a streak of 25 straight chances without allowing a goal on the man advantage. That streak extended to 26 before Mark Stone scored his first of two on a deflection off Dennis Seidenberg’s skates to give the Sens a 1-0 lead late in the first period.

While the penalty kill is doing good things, the Black and Gold are having a difficult time getting their opponents to the penalty box. Over the last 11 games, the B’s have had only 24 chances on the power play. Their 95 chances with the man advantage are second-fewest in the league behind the Anaheim Ducks, who enter Sunday with 89 PP opportunities.

Against the Sens, the Bruins had two chances on the power play. Despite not scoring on either, they generated some scoring opportunities and established some momentum, particularly in the second period where they outplayed Ottawa only to find themselves trailing 2-1 after 40 minutes.