Again, we have to take into account context, particularly:
Where in the season ("its early")
Where the Angels are at, in terms of contention (not good, but not disastrous...yet)
Who would replace him (Daniel? Rosenberg?)
Ergo...give him another two or three starts. I've been saying he's toast since last year...I'm not sure if he's recoverable, to be honest, and if he is it is going to take time. But it isn't like he's blocking anyone, at least not until Dana is ready - and that likely won't be until Aug/Sept at the very earliest, if that.
But if he continues with the suckage, sure, put him in the pen and give Daniel or Rosenberg some starts.