No you cannot! Someone did not read the fine-print contest rules which clearly state that picks must be alternated between posters/no back-to-back picks!
Contest Rules:
any SB forum member may play
must guess consonants only - no vowels
guesses must alternate between posters - no back-to-back guesses by same poster
guessing a letter already called loses turn
contestants may solve at any time
winner based on time/date stamp of guess - edit time/date will prevail
in event of tie we go head-to-head on new puzzle
johnnyirishxm or members of his extended website family not eligible