King's Lynn Stars have signed Danish rider Ulrich Ostergaard ahead of Wednesday's home Elite League clash with Eastbourne Eagles.
The 31-year-old, who is number one for Redcar Bears in the Premier League, will replace Joe Screen in the line-up.
"We thank Joe for all his help but with eight home matches left we feel this move makes us stronger at reserve," said Stars promoter Buster Chapman.
"Ulrich has a good record around King's Lynn and enjoys riding here very much."
King's Lynn are currently fifth in the Elite League, one place and five points below Eastbourne.