NHL Blog Beat – Sunday, April 21, 2013.

The NHL playoff watch, the case for John Tavares for the Hart, a look at Alexander Ovechkin’s offensive surge, a post-mortem for the Sabres and more.

PUCK DADDY: Greg Wyshysnki with your NHL playoff death watch for Saturday and Sunday.

Should John Tavares be nominated for the Hart Trophy?

Should John Tavares be nominated for the Hart Trophy?

THE CHECKING LINE: Rob McGowan makes the case for NY Islanders star John Tavares for the Hart Trophy.

LIGHTHOUSE HOCKEY: A look back at the darkest of the many dark chapters in the NY Islanders history since the mid-1990s: John Spano’s ill-fated attempt to purchase the club.

SB NATION: Pat Iversen on how Keith Yandle honored Martin Richard, the little boy killed in the Boston Marathon bombings.

DRIVING PLAY: Breaking down the numbers behind Alexander Ovechkin’s “resurgence”.

BLACK & GOLD & BLUE: A profanity-laced post-mortem of the Buffalo Sabres (NSFW).

SENS SHOT: Jared Crozier calls on his club and his fellow Senators fans to knock off their hate-fest against Matt Cooke.

AWFUL ANNOUNCING: NESN Bruins play-by-play man Jack Edwards compared Matt Cooke to RFK assassin Sirhan Sirhan.

SPECTOR’S NOTE: I understand the basis of Edwards’ anger toward Cooke, but that doesn’t justify publicly comparing him to a convicted assassin. Not only is it the stupidest thing said by an on-air NHL personality this season, it may be the stupidest thing ever said by one. Interestingly, Edwards subsequent apology came following a first intermission visit by a visibly upset Penguins GM Ray Shero