This makes no sense. By all accounts the Jays made Pearce one of their top priorities this winter, and he even confirmed it. So if they knew they wanted him, and wanted Smoak to play everyday/against righties, then that means they signed Pearce to play LF. I mean, I guess it's better to have him in the lineup in some capacity, but why turn above average defence at first to below average defence in left just to accommodate Justin freakin Smoak? The internal LF options aren't the greatest, but come on. Just sign Pagan and release Smoak. We aren't the Rays.
THis is clearly on the front office. Gibbons would probably prefer playing Zeke as much as possible with Pearce at first (as evidenced by Smoak riding pine for much of the last two years), but he'll be forced to do this lineup for at least a month, maybe more. If Pearce gets hurt playing the outfield, then that would be horrible.