Middlesbrough defender Julio Arca returned to action after recovering from a broken foot by turning out for the reserves on Monday.
Arca signed for Boro last summer
The 25-year-old played for 68 minutes during the 1-1 draw at Blackburn.
It was the former Sunderland player's first taste of football since breaking his foot in the 3-2 defeat at Reading on the opening day of the season.
Fellow defender Robert Huth, who signed for £6m in the summer, played the whole match as he aims to regain fitness.
Matt Derbyshire put the home side ahead just after a minute's play before striker Danny Graham equalised in the second half for the visitors.