Twitter can be a fantastic tool for breaking news, and this may be one of those cases.

Brian McRae posted the following on Twitter, and then pulled it shortly after, but not before several re-tweeted the news:

My dad is out as Cards hitting coach (Hal McRae)…..McGwire is in! (as in Mark)-fire it up boys/girls

ESPNewsService is backing the rumor on Twitter. The only tweet left standing by Brian McRae simply reads, “Good 5yr. run with the Redbirds,” yet another reference to his father Hal’s tenure with the Cardinals.

No word out at this point from the Cardinals, but don’t think many aren’t hanging wondering whether Mark McGwire moves out from the shadows to become the new hitting coach of the St. Louis Cardinals. Stay tuned.

That’s interesting.