It doesn't seem weird to you to dial up your dad, say, "Hey, nice shot by Kobe", have him say "Yeah!", then go, "uh... okay, bye." And to probably do this a good twenty times during the game?
Actually, sending a text saying "Hey, nice shot by Kobe" to your father seems more weird to me than making an honest effort to actually have a conversation. Do you really have to send him these texts throughout the game anyway? What's the point again?
Here's how I do it. If I know my dad is watching a game I might call after the game and talk to him about it for a bit. Most phone calls between us last about 5 to 10 minutes usually and don't require any in depth discussions really. Then again, my dad wouldn't even know how to text on his phone.
Like I said, if it works for you two, that's fine. I'm just saying that texting is generally used precisely because people don't want to actually have a conversation with the person, which begs the question, if you don't want to actually have a conversation with them, why not just not have the conversation at all and wait until you do want to?