Obstruction-rundown

[jmkupka]

Think I tanked this one...
Men's modified. No outs. R1 on 1B. Grounder to F8. R1 rounds 2B and is OBS by F6. F8 fires to 3B and starts a rundown. After a while, R1 is tagged out sliding into 2B. "Dead ball, obstruction, I have the runner protected right here (2B)"

R2 is standing on 2B at the time. Fielder tags R1 (I make my call), then R2. I call R2 out because the lead runner owns the base.

How can I call an out on a runner when I just called dead ball?

I thought it was just bad base running by R2, since the rundown gave him time to see R1 might have to come back to 2B.

Is this textbook "another runner having been affected by the OBS" and send him back to 1B?