Note: We’re thrilled to have Drew Fairservice join the FanGraphs team of writers. He’ll be contributing here on a regular basis, and we think you’ll like him a lot.

In the run-up to the trade deadline, we read countless reports of team X sending scouts to watch player Y’s next start, a standard baseball practice which seems weird because it isn’t as though Jon Lester, David Price, et al are unknown commodities. Why go watch them? What could scouts possibly see in a handful of July starts that might sway any decision to acquire such proven big league talent, especially on a rental basis?

Our projection systems provide a snapshot of the potential gains grabbing such a player delivers between the deadline and the end of the season. Using the available means, we roughly figure the Tigers can expect a couple wins from Price in the regular season over Drew Smyly.

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