However, Molenaar had an almost instant impact as he made his debut as a replacement in the opening day win over Bath Rugby in the Guinness Premiership.
He went on to make 19 starts and 8 replacement appearances, forming impressive midfield partnership partnerships with both Eliota Fuimaono-Sapolu and Mike Tindall.
His powerful running and robust defence have quickly made him a crowd favourite at Kingsholm to the extent that he was sponsored as the season progressed by a supporters' website.
Head Coach Bryan Redpath confirmed that Tim had more than delivered what was expected of him this season.
"Considering his late arrival with us and the fact that he missed preseason, Tim's had an outstanding season."
"Various injuries in the backline have meant that he's had to partner different people in the midfield but he's risen to the challenge and genuinely improved as a player as the season has progressed."
"We're delighted that he's committed himself to the club for the season after next, particularly with 2011 being a World Cup year when strength in depth will be very important."