Defenseman Torey Krug delivered unexpected game-changing performances in the playoffs last season and most experts have felt it’s a sure thing that he will be in the Bruins’ opening night lineup Oct. 3 against Tampa Bay.

That might be the case but Krug is facing stiff competition during training camp from former Boston University star David Warsofsky who also would like to be the team’s Erik Karlsson-like offensive defenseman.

Add Joe Morrow a former first-round pick acquired from Dallas in the Tyler Seguin trade to the mix and the Bruins suddenly are overstocked with a brand of player they have had a hard time finding in recent years.

“(Krug) and I are kind of battling for the same position” said the 23-year-old Warsofsky who saw plenty of ice time in last night’s 3-2 preseason shootout win against the Washington Capitals. “But at the same time we played together all last year (for Providence of the AHL) so it was good to see him go up and be successful. But it is a competition. That’s why I’m trying to prove myself.

“On any team in any organization there’s always people who want to take the next step and take away somebody’s job.”

Warsofsky actually made the team coming out of training camp for the abbreviated 2012-13 season but he quickly was sent back to Providence without appearing in an NHL game.

Since completing his college career the Marshfield native has eight goals and 40 assists in 134 AHL games. He has tried to develop more consistency during his time in the minors.

“I wouldn’t say disappointed” he said of not yet playing in the NHL. “I mean when you turn pro out of college you obviously hope to play in the NHL right away. For some people it takes longer than others. Some guys play in their first year. Others may not make it until their fifth year.”

Warsofsky’s size — 5-foot-9 172 pounds — has worked against him. But the play of Krug showed speed and skill can be just as valuable as brawn and toughness. Warsofsky is an excellent skater with good skills and a high hockey IQ. He is a creative offensive player cut from a similar mold as Ottawa’s Karlsson Pittsburgh’s Kris Letang and Winnipeg’s Tobias Enstrom.

“People are always saying to me ‘How can you do it at your size?’ ” Warsofsky said. “Ten years ago in the NHL that definitely would have been an issue. But look around the league now and there are so many guys who are my size playing and being successful. I kind of use that as motivation. Guys my size can play at that level.”