Traders are pricing huge moves on Ethan Holliday's MLB debut timeline, with 2029 markets jumping over 50¢ to 59¢. The betting frenzy centers on the younger Holliday brother, who ranks as the Rockies' top prospect and is expected to make his MLB debut in 2029, according to MLB.com.

But the aggressive timeline betting may be premature. While some think there's a path for Holliday to make the roster come opening day, it's more obvious that he will be on the Single-A roster for the beginning of the season. The 19-year-old is just 6-for-29 (.207) to begin his first full professional season, suggesting the 2026-2028 debut markets might be wishful thinking from Colorado fans hungry for hope.