The roster competition drawing the most attention for the Boston Bruins during preseason and training camp is the third and fourth lines.

The ideal situation for the B’s is their bottom-six forwards are tough to play against. Specifically, they take on tough defensive assignments and hold their own offensively.

For more on the bottom-six, check out the “NESN Live” video above, presented by Cross Insurance.

Thumbnail photo via Sergei Belski/USA TODAY Sports Images