Heat coach Erik Spoelstra made no mention of Chris Bosh in two video messages posted today on the team’s website, relays Barry Jackson of The Miami Herald. The status of the veteran big man remains uncertain after his past two seasons were cut short because of blood clots. Spoelstra singled out Hassan Whiteside, Josh Richardson, Justise Winslow and Tyler Johnson as defensive leaders who will define the team in the post-Dwyane Wade era. “You learn pretty quickly in this league that your roster is going to change,” Spoelstra said, “sometimes your staff changes. Expectations change. It’s like that every year. Just when you get comfortable, it will change. This is a new challenge. We’re embracing the change. We’re excited about the future, excited about the guys we have on our team. You also have to have the right kind of players.” Owner Micky Arison named Bosh as part of the Heat’s future in a recent letter to Miami fans.

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