The issue of growing out of the division is certainly something that effected Oleydong Sithsamerchai who turned professional in 2002 at 105lbs and remained in the division until 2011 when he suffered his first, and so far only, loss, a stoppage to Kazuto Ioka. For more than 3 years he held the WBC world title and defended it successfully 6 time before the loss to Ioka. The last of those successful defences came in his second meeting with Pornsawan Porpramook, a future WBA world champion.
At times early on Oleydong looked sensational though at other times it was clear he was struggling with the 105lb limit. He lacked the power to back up Porpramook, at times he lacked the bounce in his step to escape his fellow Thai and he fought very much like a man who knew he wasn't his usual self and one who would later suffer what appeared to be a leg injury.
We won't ruin much more of the fight though we would advise you keep a close eye on the very interesting 6th round, as well as the fighters reactions at the end of the bout, which included Porpramook doing push ups in the ring as if to suggest he found the bout easy.