Cobb (elbow) is expected to throw a bullpen session Thursday before a third rehab start this weekend, Marc Topkin of the Tampa Bay Times reports.
Cobb has been roughed up in his first two rehab outings, recording two losses and giving up four earned runs over 1.2 innings. The Rays are likely to ease the 28-year-old back into game form as he hasn't pitched in the majors since 2014 as he makes his recovery from Tommy John surgery. Given his struggles in his rehab stints so far, it's likely Cobb could be held in the minors for another three to four weeks as he makes his way back to 100 percent.