Looks like I'm in the minority here with Boston. I've looked at a couple places and it's ALL Detroit.
I think this is a great number and value with Boston. Olson is overdue for regression. His expected ERA is almost double his current ERA. If/when this becomes a bullpen game Boston will have a clear advantage.
As stated, Olson did regress today giving up 5 earned runs, moving him closer to his expected ERA and that was enough to give Boston the W this afternoon. His 0.64 ERA in May and prior to today's start, 1.92 ERA for the season thus far was unsustainable and overdue for a correction.