The Tennessee Titans fell to 0-3 on the season with an all-too-familiar performance Sunday against the Indianapolis Colts. Then on Tuesday, they decided to make a few changes. Coach Brian Callahan said he is going to give up play-calling duties so he can focus on larger in-game issues, and second-year cornerback Jarvis Brownlee was traded to the New York Jets. Are those moves --- and maybe a few more in the coming weeks --- going to be enough to make a substantive difference, or is all of this just prelude to a coaching change?