Team Sunweb announce stagiaires for 2019 season Development Team Sunweb's Nils Eekhoff and Martin Salmon are set to join the team's WorldTour program as stagiaires for the remainder of the 2019 season. 21-year-old Marten Kooistra also makes the step up for the rest of the year, after an impressive display of strength during the past four seasons riding for SEG Racing Academy. | 