Those searching for clarity— and answers —from Orioles second baseman Brian Roberts' presence at the club's first full-squad workout Friday were given few.

Sidelined since May when a slide into first base triggered a second set of concussion symptoms, Roberts' baseball future remains uncertain . On Friday morning, Roberts took part in pre-workout activities with his teammates at the Ed Smith Stadium Complex, an act that was undecided until 24 hours earlier.

He then played catch with shortstopJ.J. Hardybefore disappearing into his own world of seclusion, one that still leaves the Orioles both cautiousand concerned.