San Diego Padres pitching prospect Francis Pena (undisclosed) will participate in extended spring training. The team did not specify when Pena sustained this injury. The right-hander will now be built up more slowly in extended camp before making his regular-season debut. Last season, the 24-year-old opened the campaign at the High-A level and was able to progress through Triple-A. Through 21 innings at High-A, Pena held a near-perfect 0.86 ERA with a 0.95 WHIP. At Double-A, continued to perform well, posting a strong 2.05 ERA with a 0.87 WHIP across 26 1/3 innings of work. However, during his first brief 15 2/3 innings of work at the Triple-A level, Pena took a step back, holding a 5.17 ERA with a 1.34 WHIP. When he is cleared to return, he will likely open the season with Triple-A El Paso.