Offer sheets are no longer the impossible unicorn of offseason NHL transactions. The St. Louis Blues changed that two years ago when they pushed their chips in to snag Dyllan Holloway and Philip Broberg from the Edmonton Oilers. Nevertheless, offer sheets remain extremely rare in the salary-cap era, and the reasons why are pretty obvious. On the intangible side, they bring risk in that they can damage relationships between GMs. Don’t believe me?