The Peruvian joined the Hammers on a short-term deal last summer and despite being used sparingly by Alan Curbishley he had a brilliant season.
Nobby made 23 appearances for the Hammers and scored four handy goals. His skill and precision with set pieces proved a valuable weapon on numerous occasions through the season and it comes as somewhat of a surprise that Curbs has deemed the 34-year-old not worthy of another season.