Quinton Patton has had a tough break in his rookie season in the NFL.Two of them, actually.First, he broke a finger in training camp that delayed his bid to earn playing time. Then, last Thursday night in his first pro start for the 49ers against the Rams, the fourth-round pick from Louisiana Tech suffered a fracture in his foot shortly after catching his first, official pass, and he's expected to miss several weeks.It's all been part of a series of problems for the 49ers receiving corps that has hampered the San Francisco offense. At 2-2, San Francisco is still looking for a solid No. 2 target at wide receiver as it begins preparations for Sunday night's matchup against the Houston Texans at Candlestick Park.Anquan Boldin has been outstanding, but Kyle Williams, Marlon Moore, Patton and Jonathan Baldwin have combined for just 13 receptions – with nine of those belonging to Williams.Veteran Mario Manningham is expected back to practice in about two weeks, and Michael Crabtree could be back in late November. But what do the 49ers do in the meantime?In games against the Seahawks and Colts, quarterback Colin Kaepernick seemed unable to find wide receivers who were struggling to...