Henderson started his career with Norwich City and made almost 70 first team appearances with them before joining Northampton Town in July 2007 following a six-month loan spell at Rotherham United.
hˈɛndɚsən stˈɑːɹɾᵻd hɪz kɚɹˈɪɹ wɪð nˈɔːɹɪtʃ sˈɪɾi ænd mˌeɪd ˈɔːlmoʊst sˈɛvənti fˈɜːst tˈiːm ɐpˈɪɹənsᵻz wɪð ðˌɛm bᵻfˌoːɹ dʒˈɔɪnɪŋ nɔːɹθˈæmptən tˈaʊn ɪn dʒuːlˈaɪ tˈuː θˈaʊzənd sˈɛvən fˈɑːloʊɪŋ ɐ sˈɪksmˈʌnθ lˈoʊn spˈɛl æt ɹˈɑːðɚɹˌæm juːnˈaɪɾᵻd.