TL;DR: Expressing faith is not presumption, it's being yourself...and when you talk about what YOU believe, that does not equate to telling others what to believe.
Here's what folks don't get about this: When you're a Christian, it is so much a part of what you do that you naturally talk about it...especially in a field of leadership where there are going to be other people that share that faith (and where workplace rules don't prohibit it) You can't just turn it off...faith doesn't work that way. After all it's what YOU believe, and it shapes how you view things, and how you lead. So when you're asked about your leadership, if that's part of it...it comes out. And you can believe when he coaches, the players bring up the same stuff.
I mean players talk about their faith too! Lamar just did that the other day...and you KNOW how much Ray Lewis did (and still does!) It's just a part of who you are. Should a player not say it simply because some people don't believe it? Is it wrong for teams to have chaplains?
I promise you there are men of faith on every team. but some do (in the Ravens case there are many that do). But nobody is making anybody believe anything! So...it's probably not turning off the players that don't believe, and not taking away from the game...so, what's the problem?