Search a title word through query_posts (not the exact match)

Use search parameter ‘s’ instead of ‘name’

query_posts( array(
's' => $sportsman_name,
'post_type' => 'db',
'posts_per_page' => 100,
'paged' => $paged,
'category_name' => $sport,
'meta_query' => array(
    $height,
    $weight,
    $tshirt_size,
    $foot_size,
)));