‘Dealing Bowen Byram, who with the Chicago Blackhawks has the opportunity he coveted to become a No. 1 defenseman, and dishing winger Alex Tuch to the Washington Capitals in a sign-and-trade deal, has left two huge holes in the lineup. It appears Olen Zellweger, the defenseman the Sabres acquired Friday in a trade with the Anaheim Ducks, will replace Byram. Buffalo’s blue line, still one of the NHL’s deepest and most talented, might be set other than some depth additions.’