Selsky is the only OF on the 40 man roster not currently playing in Boston.
The other two starters at Pawtucket are Castillo (not being promoted in a 1,000,000 years) and Aneury Tavarez. Tavarez was the guy the O's picked in the Rule V draft but had to return. He was mashing AA pitching as a 25 year old. He has decent speed, but the Sox basically refuse to play him in CF. He's only had 4 starts in Pawtucket. He went 5 for 8 in his first 2 games with 2 HRs. He's been 0 for 10 ever since. In order for him to be called up, he'd have to really start mashing. He'd be an interesting call up, but if they aren't interested in playing him in CF, his value is diminished.