Luis Castillo has been underperforming with a 3.69 ERA but is seen as someone still worth holding onto due to his track record and potential to improve post-All-Star break. His recent performances have not been as stellar as expected, but he is not yet considered a drop.

Luis Castillo is slated to pitch for the Mariners against the Twins, coming off a solid performance against the Red Sox with a 3.38 ERA. His effectiveness on the mound will be crucial for the Mariners as they aim for a win.

Castillo remains a reliable pitcher for the Mariners, showing consistent performance throughout the season. His matchups this week present an opportunity for fantasy managers to capitalize on his strengths.

Luis Castillo is pivotal for the Mariners' hopes against the Red Sox. With a 2.48 ERA in recent home starts, he has the potential to dominate as he faces a struggling Boston lineup.

Luis Castillo enters today's matchup with an impressive NRFI record, showcasing his exceptional ability in the first inning. As the Mariners' ace, his performance will be critical for NRFI bets against the Red Sox.