Earlier this week, Francisco threw a long-toss session, but told reporters he was lacking arm strength.
Rubin recently said Francisco is expected to open the season on the disabled list.
Francisco had surgery to remove bone chips from his elbow in December. He had been shutdown early in camp after experiencing discomfort in his elbow.
Francisco went 1-3 with a 5.53 ERA in 48 relief appearances in 2012, having allowed 26 earned runs, 47 hits, 21 walks with 47 strikeouts in 42 1/3 innings in 2012 – he was shutdown after September 16 after being diagnosed with right elbow soreness.